MEMORANDUM OPINION
ELLIS, District Judge.
The twelve claims in this lawsuit, including claims under the Racketeer Influenced and Corrupt Organizations Act (“RICO”), 18 U.S.C. § 1961 et seq., the Truth in Lending Act (“TILA”), 15 U.S.C. § 1601 et seq., and the Sherman Act, 15 U.S.C. § 2, have now been finally dismissed. Only the question of possible Rule 11, Fed.R.Civ.P., sanctions re[302]*302mains. That question was referred to a magistrate judge, pursuant to 28 U.S.C. § 636, who, in turn, issued a Report and Recommendation recommending that sanctions be imposed jointly and severally against plaintiffs and plaintiffs’ counsel in the amount of $37,393.57 on the grounds (i) that plaintiffs’ counsel did not appropriately investigate whether plaintiffs’ claims under RICO, TILA, and the Sherman Act were warranted by existing fact or law and (ii) that these claims were filed for an improper purpose. See Giganti, et al. v. Gen-X Strategies, Inc., et al., Civil Action No. 03-737-A (E.D.Va. Mar. 16, 2004) (Report and Recommendation). Plaintiffs filed timely objections to the magistrate judge’s Report and Recommendation. As the sanctions issues have been fully briefed and argued, they are now ripe for disposition.
I.
This lawsuit is but the latest chapter in a saga that bears recounting here. Plaintiff, Joseph Giganti, a Maryland resident, is a principal of Veritas Media Group, Inc., a Maryland corporation engaged in the business of providing media consulting services. Defendant Jeffrey Frederick, a Virginia resident, is a principal of Gen-X Strategies, Inc., a Virginia corporation and provider of Internet-related services. In June 2000, Giganti and Frederick, whose personal relationship pre-dated their business dealings, entered into an oral contract whereby Gen-X agreed to host Veritas’ website on its servers and to set up e-mail accounts for Veritas. Pursuant to this agreement, Gen-X, as it routinely does for its customers, registered in its own name three domain names for Veritas: veri-tasmediagroup.com, vmginc.org, and gigan-ti.org. Also pursuant to the agreement, Gen-X, using its servers, hosted websites for Veri-tas at these domain names and provided Veritas with e-mail services.
Within a few months, Veritas failed to pay for the various services Gen-X provided pursuant to the agreement. In response, Gen-X sent a letter to Veritas in February 2001 indicating that it intended to charge a ten percent per month finance charge on all overdue balances for services rendered. Thereafter, between February 2001 and August 2003, Gen-X sent Veritas monthly invoices, both electronically and by mail, seeking collection of the amounts Veritas owed for services rendered. These invoice amounts included finance charges on Veritas’ overdue balances of at least ten percent per month.1
In early 2002, Giganti requested by e-mail that Frederick (i) reduce the amounts Veri-tas owed and (ii) transfer ownership of Veri-tas’ domain names. Gen-X rejected both requests. In March 2002, Veritas terminated the contract. A month later, Gen-X made clear that it intended to maintain control of the domain names as “leverage” until Veritas paid its bills.2 Moreover, at about the same time, Gen-X disabled Veritas’ e-mail accounts by changing Veritas’ passwords. As a result of these actions, Veritas alleges it was unable to operate its business efficiently.3
To collect the amounts owed by Veritas, Gen-X filed a lawsuit in Alexandria General [303]*303District Court in September 2002 alleging that plaintiffs owed Gen-X in excess of $5,000. The amount claimed included interest of ten percent per month plus attorney’s fees. Plaintiffs here removed that case to the Alexandria Circuit Court pursuant to Virginia Code § 16.1-92, where following a bench trial, the presiding judge in September 2002 found Veritas liable for overdue balances and finance charges in the amount of $4,598. Veritas, however, was not found liable for amounts billed after March 2002 because Veritas had by then terminated the agreement and cancelled the services. Even so, the state court judgment included finance charges and interest that accrued from March 2002 and to September 2002 on overdue balances for the services rendered before the termination. Notably, the state court entered judgment in the amount of $4,598 only against Veritas, which elected not to pursue an appeal.
Yet, this judgment did not mark the end of the parties’ feud. Apparently unhappy with the state court judgment and with defendants’ collection efforts, Veritas and Giganti, having foregone an appeal of the state judgment, chose instead to file a federal complaint in this district on June 6, 2003 against Gen-X and Frederick alleging seven state claims4 and the following five federal claims:
(1) Racketeer Influenced and Corrupt Organizations Act violations, 18 U.S.C. § 1961 et seq.;
(2) Truth in Lending Act violations, 15 U.S.C. § 1601 et seq.;
(3) Cybersquatting, in violation of 15 U.S.C. § 1125(d);
(4) Attempted Monopolization, in violation of 15 U.S.C. § 2; and
(5) Violations of Fair Debt Collection Practices Act, 15 U.S.C. § 1692 et seq.
At this point, the timeline of activities in this federal lawsuit becomes particularly important. On November 21, 2003, defendants filed a motion to dismiss all twelve counts. On the same day, notably, defendants served on Veritas and Giganti a motion for sanctions pursuant to Rule 11(c)(1)(A), Fed.R.Civ.P., arguing that plaintiffs’ claims were frivolous, ungrounded in fact and law, and filed for an improper purpose. Appropriately, this sanctions motion was not filed with the court at this time.5 Also on November 21, 2003, defendants noticed a hearing on their dismissal motion for December 12, 2003, precisely twenty-one days after service of the sanctions motion on Veritas and Giganti. At the December 12 hearing, counsel for Veritas and Giganti appeared and argued vigorously in support of the challenged claims. Significantly, counsel said nothing in the course of the hearing about having been served with a sanctions motion, nor did he ask for additional time to decide whether to withdraw any of the claims subject to the sanctions motion. At the conclusion of oral argument, a bench ruling dismissed all but two of plaintiffs’ claims, namely the FDCPA and the ACPA claims. See Giganti et al., v. Gen-X Strategies, Inc., et al, Civil Action No. 03-737-A (E.D.Va. Dec. 12, 2003) (Order).6
Three weeks later, defendants, on January 9, 2004, filed a motion for summary judgment with respect to the remaining two claims and, shortly thereafter, plaintiffs filed a cross motion for summary judgment. After a hearing, defendants’ motion for summary judgment with respect to plaintiffs’ FDCPA claim [304]*304was granted and the parties’ motions with regard to plaintiffs’ ACPA claim were taken under advisement. See Giganti, et al. v. Gen-X Strategies, Inc., et al., Civil Action No. 03-737-A (E.D.Va. Jan. 23, 2004) (Order). Thereafter, settlement negotiations ensued, and on February 5, 2004, the parties filed a stipulated order dismissing the final remaining claim, the ACPA claim. See Gi-ganti, et al. v. Gen-X Strategies, Inc., et al., Civil Action No. 03-737-A (E.D.Va. Feb. 5, 2004) (Stipulated Order of Dismissal).
Approximately two weeks later, on February 17, 2004, defendants filed their previously-served motion for sanctions pursuant to Rule 11, Fed.R.Civ.P., and this matter was referred to a magistrate judge pursuant to 28 U.S.C. § 636. Following a hearing on February 27, 2004, the magistrate judge entered a Report and Recommendation recommending that sanctions be imposed against plaintiffs and plaintiffs’ counsel in the amount of $37,393.57 with regard to plaintiffs’ RICO, TILA, and Sherman Act claims.7 Plaintiffs timely filed five objections to the magistrate judge’s Report and Recommendation.8 Specifically, plaintiffs contend that the magistrate judge’s recommendations must be rejected and defendants’ motion for sanctions denied because:
(1) Defendants failed to comply with the procedural requirements of Rule 11(c)(1)(A), Fed.R.Civ.P., namely (i) that plaintiff must be afforded at least twenty-one days after service of the motion for sanctions during which plaintiff may elect to withdraw the allegedly offending claims and (ii) that the motion for sanctions must be filed before conclusion of the case;
(2) Defendants failed to notice the hearing on their motion for sanctions more than eleven (11) days in advance of the hearing to allow plaintiffs adequate time to respond and present their defenses, as required by Local Rule 7;
(3) Plaintiffs’ amended complaint was well-grounded in fact and law and not filed for an improper purpose;
(4) The recommendation to impose sanctions was based on letters written by the parties in pursuit of a settlement that are not properly considered under Rule 408, Fed.R.Evid.; and
(5) The recommended amount of sanctions was unwarranted, excessive, and failed to take account of plaintiffs’ ability to pay.
Pursuant to 28 U.S.C. § 636(b) and Rule 72(a), Fed.R.Civ.P., each of these objections is reviewed here under the clearly erroneous and contrary to law standard. See 28 U.S.C. § 636(b); Rule 72(a), Fed.R.Civ.P.9 [305]*305Pursuant to the clearly erroneous standard of review, the magistrate judge’s order must be affirmed unless after review of the entire record, “ ‘the reviewing court... is left with the definite and firm conviction that a mistake has been committed.’ ” See Allmond v. Dunning, 2003 WL 23330683, at *1 (E.D.Va. Jan.2, 2003) (unpublished disposition) (quoting United States v. United States Gypsum Co., 333 U.S. 364, 395, 68 S.Ct. 525, 92 L.Ed. 746 (1948)).
II.
At the threshold, plaintiffs advance two procedural arguments that, if accepted, would bar the imposition of Rule 11 sanctions. Specifically, plaintiffs, citing the Rule’s language and the Fourth Circuit’s decision in Brickwood Contractors v. Datanet Engineering, 369 F.3d 385 (4th Cir.2004), argue that sanctions cannot be imposed (i) because defendants failed to comply with Rule 11(c)(1)(A)’s twenty-one day “safe harbor” provision and (ii) because the motion for sanctions was not filed until two days after the conclusion of the case. Neither argument is ultimately persuasive.
It is true, to be sure, that Rule 11(c)(1)(A) contemplates the following procedure for seeking sanctions: First, a party must serve a motion for sanctions on the allegedly offending party and second, twenty-one or more days after service, the party must file the motion with the court, provided the allegedly offending claim was not withdrawn or corrected during the twenty-one day period.10 As the Advisory Committee’s Note and pertinent authority also make clear, the twenty-one day “safe harbor” period guaranteed by the Rule is intended to “giv[e] litigants a specific amount of time [after service of a motion for sanctions] in which to withdraw an offending filing or allegation before a motion is filed” with the court.11 Thus, a motion for sanctions must [306]*306not be filed if the alleged violation is corrected by the opposing party within the twenty-one day “safe harbor” period.12 Nor can sanctions be imposed where a motion for sanctions is filed earlier than twenty-one days after service of the motion on the opposing party13 or where the allegedly offending claim is dismissed by court order less than twenty-one days after service.14 This is so because in both instances — (i) when the motion is filed less than twenty-one days after service and (ii) when the claim is dismissed by court order less than twenty-one days after service — the allegedly offending party is not afforded the full twenty-one day period during which the party can withdraw the offending claim.15
Plaintiffs rely on these principles to argue that sanctions are barred here because the allegedly offending claims were dismissed at about noontime on December 12, 2003, the twenty-first day of the safe harbor period, and plaintiffs were thus not afforded the benefit of the Rule’s mandatory safe harbor provision. The facts refute plaintiffs’ argument. This case, unlike Brickwood Contractors, Inc. v. Datanet Engineering, Inc., 335 F.3d 293 (4th Cir.2003), and the other eases plaintiffs rely on,16 does not involve denying a party the opportunity to withdraw the offending pleading or claim during the Rule’s twenty-one day safe harbor period. To the contrary, the record in this case makes unmistakably clear that defendants deliberately [307]*307chose not to avail themselves of the protection of the Rule’s twenty-one day safe harbor provision. Thus, in the first twenty days, plaintiffs took no steps to withdraw the offending claims and indeed, on the twenty-first day, plaintiffs, far from abandoning the claims, appeared by counsel at the hearing on the motion to dismiss the claims and argued vigorously in opposition to the motion. Not once in the course of the hearing did plaintiffs’ counsel advise the Court that a sanctions motion had been filed, that approximately five hours remained in the twenty-one day safe harbor period, and that plaintiffs wanted to use that time to consider withdrawing one or more of the putatively frivolous claims even though plaintiffs surely knew (or should have known) that a ruling on the motion to dismiss would likely issue from the bench, before the end of the day, as is customary in this district.
The conclusion compelled by these record facts is inescapable: Plaintiffs never had any intention of withdrawing any of the challenged claims, nor of availing themselves of the protection of the safe harbor provision. Put differently, by choosing to remain steadfast in their support of the offending claims during the hearing on the motion to dismiss, even in the face of defendants’ cited authorities and the Court’s suggestion that the RICO and Sherman Act claims might well violate Rule 11,17 plaintiffs, by counsel, knowingly waived the benefit of the twenty-one day period and knowingly waived any right to complain about loss of no more than approximately five hours of the twenty-one day period.18
While there appears to be no authority in this circuit on what conduct might constitute a valid, effective waiver of the Rule’s twenty-one day safe harbor period, there is Sixth Circuit authority that squarely supports the result reached here. In Hadden, et al. v. Cty. Bd. of Commissioners, 1997 WL 434413, 1997 U.S.App. LEXIS 20001 (6th Cir.1997) (unpublished disposition), the Sixth Circuit affirmed the district court’s grant of sanctions even though defendants failed to comply with the technical requirements of the twenty-one day safe harbor rule on the ground that plaintiffs had had ample opportunity to choose to dismiss the offending claims, but chose instead to file their own motion for summary judgment, objections to the magistrate judge’s report, and response to the motion for sanctions. See id., 1997 WL 434413, at *1, 1997 U.S.App. LEXIS 20001, at *3-4.19 In other words, plaintiffs in Hadden, as plaintiffs here, made clear their intent to forego the twenty-one day safe harbor. There, as here, the party against whom sanctions were sought could not be heard to complain about the loss of the benefit of the twenty-one day safe harbor when it was clear that the party rejected that option.
Plaintiffs’ objection to the magistrate judge’s recommendation on the ground that the motion for sanctions was not filed until two days after conclusion of the ease is similarly unpersuasive. At the threshold, this objection must be denied because it was not [308]*308argued before the magistrate judge and cannot be raised for the first time as part of plaintiffs’ Rule 72 motion.20 Even assuming arguendo that plaintiff could raise this objection now for the first time, it would nonetheless fail for the following reason. It is true, to be sure, as plaintiff contends, that the Fourth Circuit stated in Brickwood that “the very structure of the safe-harbor provisions [sic] makes it clear that a sanctions motion must be served and filed before the conclusion of the case.” Brickwood, 369 F.3d at 398. Yet, while the Advisory Committee’s Note and authority in this and other circuits leave no doubt that a sanctions motion served after conclusion of the case must be denied,21 it is nonetheless clear, even after Brickwood, that sanctions may be granted when a sanctions motion is filed after conclusion of the case, provided it is served at least twenty-one days prior to filing and conclusion of the case, as occurred here.22 This principle finds firm support in the purpose of Rule ll’s twenty-one day safe harbor period, namely to allow the offending party twenty-one days to withdraw the offending claims [309]*309and escape sanctions.23 There is no doubt that this purpose is served where the motion is served at least twenty-one days prior to filing or dismissal of the offending claims, even if it is filed after conclusion of the case.24 Moreover, plaintiffs’ contention must be rejected not only because the statement plaintiff relied on in Brickwood is dictum,25 but also because nothing in Rule 11, the Advisory Committee’s Note, or the cases suggests that a sanctions motion must be filed before conclusion of the case.26 Nor would such a rule make sense, for if a party were required to file a sanctions motion before conclusion of the case, the party, in preparation for a hearing on a motion to dismiss scheduled twenty-two days after service of the sanctions motion, should prudently file the sanctions motion at precisely 5:00 p.m. on the twenty-first day of the safe harbor period, just in case the dismissal motion is granted via a bench ruling or order issued first thing on the morning of the twenty-second day. The point is that courts, as is often the ease, will be unaware that a sanctions motion has been served on a party and may proceed to dismiss the case without a hearing or before the party serving the motion has a reasonable opportunity to file the sanctions motion. In this event, a movant’s right to seek Rule 11 sanctions would be cut off through no fault of the movant and importantly, with no notice to the movant to be found anywhere in the Rule’s language.
In sum, plaintiffs’ objections to the magistrate judge’s recommendation on the grounds (i) that defendants failed to comply with Rule ll(e)(l)(A)’s twenty-one day safe harbor provision and (ii) that the sanctions motion was filed two days after conclusion of the case must be overruled as the magistrate judge’s recommendation to the contrary, for the reasons stated here, are neither clearly erroneous nor contrary to law. Moreover, plaintiffs’ objection on the ground that the sanctions motion was filed after conclusion of the case also fails because that objection was not raised before the magistrate judge.27
III.
Plaintiffs next object to the magistrate judge’s recommendation to impose sanctions on the ground that defendants failed to notice the February 27, 2004 hearing on the motion for sanctions more than eleven (11) days prior to the hearing as required by Local Rule 7. As a result, plaintiffs contend they were not provided eleven days to respond to defendants’ motion, but instead received only nine days. This objection fails because Local Rule 7(E) specifically provides that it may be trumped by a contrary court order. Thus, the Rule states that an opposing party shall file a responsive brief within eleven days of service of a motion “[ujnless otherwise directed by the Court.” See Local Rule 7(E). Precisely this occurred here. The Scheduling Order entered in this case required that a moving party provide ten working days notice for dispositive motions, such as motions to dismiss and for summary judgment, but only one week notice for non-dispositive motions, such as a motion for sanctions.28 It follows, then, that plain[310]*310tiffs are mistaken in contending that Local Rule 7(E) required that defendants notice the motion for sanctions more than eleven days prior to the hearing. Moreover, because defendants noticed the motion for sanctions more than one week before the February 27, 2004 hearing, as required by the Scheduling Order, plaintiffs’ objection on this ground must be overruled.29
IV.
Plaintiffs next object to the magistrate judge’s recommendation on the ground that the allegedly offending claims were (i) well-grounded in fact and law and (ii) not filed for an improper purpose. Rule 11(b), Fed.R.Civ. P., provides that a party is entitled to sanctions in the event an opposing party files a pleading or motion that is:
(1) “presented for any improper purpose, such as to harass or to cause unnecessary delay or needless increase in the cost of litigation,”
(2) not “warranted by existing law or a by a nonfrivolous argument for the extension, modification, or reversal of existing law or the establishment of new law,” or
(3) lacking in “evidentiary support” and “[unjlikely to have evidentiary support after reasonable opportunity for further investigation or discovery.”
Rule 11(b)(1)-(3), Fed.R.Civ.P.
To begin, plaintiffs object to the magistrate judge’s recommendation to impose sanctions on the ground that the offending claims did not violate Rule 11(b)(2) and (3), i.e. they were well-grounded in fact and law. Authority interpreting Rule 11(b)(2) and (3) makes clear that these provisions of the Rule “require[ ] that an attorney conduct a reasonable investigation of the factual and legal basis for his claim before filing.” Bru-baker v. City of Richmond, 943 F.2d 1363, 1373 (4th Cir.1991) (citing Cleveland Demolition Co. v. Azcon Scrap Corp., 827 F.2d 984, 987 (4th Cir.1987)); see also Davis v. Hud-gins, 896 F.Supp. 561, 573 (E.D.Va.1995). A party or attorney may escape sanctions provided his prefiling investigation into both the facts and the law is objectively reasonable under the circumstances. See Brubaker, 943 F.2d at 1373; see also In re Kunstler, 914 F.2d 505, 517 (4th Cir.1990). In this regard, a prefiling factual investigation is objectively reasonable provided it “uncover[s] some information to support the allegations in the complaint”30 and a prefiling legal investigation passes muster under Rule 11 provided the claim has some “ ‘chance of success under the existing precedent,’ ”31 even if that chance amounts to a mere “glimmer.” Hoover Universal, Inc. v. Brockway Imco, Inc., 809 F.2d 1039,1044 (4th Cir.1987).
Plaintiffs’ objection to the magistrate judge’s imposition of sanctions on the ground that the RICO and Sherman Act claims were well-grounded in law fails. To begin, there was no objectively reasonable basis to conclude, as plaintiffs assert in their complaint, that defendants violated RICO (i) by attempting to collect an “unlawful debt” or (ii) by engaging in a “pattern of racketeering activity,” as those terms are defined in the statute. 18 U.S.C. § 1961.32 Nor was it [311]*311objectively reasonable to conclude that plaintiffs’ RICO claim was not barred from reliti-gation by Virginia res judicata law as set forth in Davis v. Marshall Homes, 265 Va. 159, 576 S.E.2d 504 (2003),33 as federal res judicata law clearly governs here under the principles set forth in Erie Railroad v. Tompkins, 304 U.S. 64, 58 S.Ct. 817, 82 L.Ed. 1188 (1938). Plaintiffs’ claim of attempted monopolization under the Sherman Act is similarly unreasonable as this claim also had no chance of success under the standard set out in Advanced Health-Care Servs., Inc. v. Radford Community Hosp., 910 F.2d 139 (4th Cir.1990).34 Accordingly, the magistrate judge’s recommendation to impose sanctions on this ground was neither clearly erroneous nor contrary to law.
Moreover, plaintiffs’ objection on the ground that the RICO and Sherman Act claims do not warrant sanctions because they were nonetheless well-grounded in fact is also unpersuasive. Simply put, plaintiffs’ counsel’s prefiling factual investigation with regard to the RICO and Sherman Act claims was uninformed by an adequate understanding of the legal principles that underlie these claims. Had plaintiffs’ counsel fully understood these legal principles, his prefiling factual investigation would have been more sharply and appropriately focused and he would have realized that the facts in this case would not support RICO and Sherman Act violations. Accordingly, while it is true that plaintiffs’ counsel may have devoted substantial time to a prefiling factual investigation into these claims that included (i) discovery during the state court litigation, (ii) review of Gen-X documents, including marketing materials, advertisements, and commercial solic-[312]*312Rations, and (iii) interviews with numerous potential witnesses acquainted with Gen-X and Frederick, including current and former Gen-X customers and their employees, the offending claims were nonetheless not well-grounded in fact because the prefiling factual investigation was not adequately informed by the law. For instance, although the Fourth Circuit made clear in Advanced Health-Care Services, Inc., 910 F.2d 139, that a plaintiff must identify a relevant market and specific predatory or anti-competitive acts to prove attempted monopolization under the Sherman Act, id. at 147, plaintiffs’ counsel appears to have made no effort to do so, nor to hire experts, who are typically relied on for these factual matters in antitrust cases. See, e.g., Virginia Vermiculite, Ltd. v. W.R. Grace & Co., 108 F.Supp.2d 549, 581 (W.D.Va.2000) (plaintiff relying on qualified antitrust economics expert to define relevant market). Accordingly, plaintiffs’ objection on the ground that its RICO and Sherman Act claims do not warrant sanctions because they are well-grounded in fact also must be overruled.
Yet, plaintiffs’ objection on the ground that the TILA claim was well-grounded in fact and law compels a different conclusion. That plaintiffs’ counsel’s prefiling investigation revealed (i) that Giganti had requested Gen-X’s services in setting up a personal website and (ii) that Gen-X regularly deferred payments from its clients points persuasively to the conclusion that it was in fact objectively reasonable for plaintiffs’ counsel to conclude that the parties’ agreement was a “consumer credit transaction,” defined by the statute as a credit transaction entered into “primarily for personal, family, or household purposes,” 15 U.S.C. § 1602(h), and that Gen-X was a “creditor,” defined by the statute as an individual or entity that “regularly extends, whether in connection with loans, sales of property or services, or otherwise, consumer credit which is payable by agreement in more than four installments or for which the payment of a finance charge is or may be required...,” 15 U.S.C. § 1602(f), and thus, it was also objectively reasonable for plaintiffs’ counsel to conclude that Gen-X’s failure to make disclosures, including the total amount of principal and interest owed, violated TILA. See Redic v. Gary H. Watts Realty, Co., 762 F.2d 1181, 1185 (4th Cir.1985). It was also not manifestly unreasonable for plaintiffs’ counsel to conclude that plaintiffs’ TILA claim was not barred by res judicata as a consequence of defendants’ state court action on the ground that some courts have held that a plaintiffs’ TILA and Fair Debt Collections Practices Act claims challenging a defendant’s debt collections practices brought after state litigation by the defendant to collect the debt are not barred by res judicata.35 Moreover, plaintiffs’ counsel engaged in a substantial factual investigation with regard to the elements of his TILA claims. Accordingly, while plaintiffs’ objection on the ground that its RICO and Sherman Act claims were well-grounded in fact and law must be overruled, the objection must be sustained with regard to the TILA claim as the magistrate judge’s recommendation as to this claim was clearly erroneous and contrary to law.
Finally, plaintiffs also contend that sanctions are unwarranted because the offending claims were not filed for an improper purpose. Rule 11 provides that an attorney and/or plaintiff must be sanctioned for filing [313]*313a claim “for an improper purpose, such as to harass or to cause unnecessary delay or needless increase in the cost of litigation.” Rule 11(b)(1), Fed.R.Civ.P. And Fourth Circuit authority interpreting the Rule makes clear that an improper purpose may be inferred from a claim’s lack of factual or legal foundation or other factor such as the timing of the filing of the complaint. See In re Kunstler, 914 F.2d 505, 518 (4th Cir.1990). While plaintiff objects to the magistrate judge’s recommendation that the offending claims were filed for an improper purpose on the ground that the complaint was filed on June 6, 2003 in preparation for the birth of plaintiffs’ counsel’s child and not for the purpose of injuring Frederick’s prospects for victory in a primary election, the evidence concerning the birth of plaintiffs’ counsel’s child was not presented to the magistrate judge and thus must not be considered here.36 Accordingly, as no evidence, other than plaintiffs’ bare assertions that the RICO and Sherman Act claims were not filed for an improper purpose, was offered to rebut the inference of improper purpose, the magistrate judge’s recommendation with regard to these claims is not clearly erroneous or contrary to law.37 Nonetheless, because plaintiff’s TILA claim was well-grounded in law, the magistrate judge’s determination that this claim was filed for an improper purpose was clearly erroneous and contrary to law and plaintiffs objection with regard to this claim must be sustained.
V.
Plaintiffs also object to the magistrate judge’s Report and Recommendation on the ground that letters between the parties concerning settlement submitted by defendants with its motion for sanctions and relied on by the magistrate judge must be excluded from consideration by Rule 408, Fed.R.Evid. That Rule provides that evidence of settlement discussions are “not admissible to prove liability for or invalidity of the claim or its amount.” Rule 408, Fed.R.Evid. The Rule does not require exclusion of this evidence, however, “when the evidence is offered for another purpose, such as proving bias or prejudice of a witness, negativing a contention of undue delay, or proving an effort to obstruct a criminal investigation or prosecution.” Id. While the Rule itself does not expressly indicate that a motion for sanctions qualifies as “another purpose” such that the rule of exclusion does not apply here, courts in this and other circuits have considered settlement documents when reviewing a motion for sanctions.38 Thus, the letters concerning settlement were properly submitted and, to the extent necessary, could have been relied on by the magistrate judge. In any event, nowhere in the Report and Recommendation does it appear that the magistrate judge relied on these letters, nor are they relied on here. Therefore, plaintiffs’ objection on this ground must be overruled.
VI.
Finally, assuming arguendo that sanctions are proper, plaintiffs object to the magistrate judge’s recommendation with regard to the amount of sanctions on the grounds that the recommended sanctions are unwarranted, excessive, and fail to take ae-[314]*314count of plaintiffs’ and plaintiffs’ counsel’s ability to pay.
Rule 11 offers little guidance as to an “appropriate sanction” for a violation of the Rule’s requirements. Rule 11(c), Fed. R.Civ.P. In this regard, the Rule simply states that:
the sanction may consist of, or include, directives of a nonmonetary nature, an order to pay a penalty into court, or, if imposed on motion and warranted for effective deterrence, an order directing payment to the movant of some or all of the reasonable attorneys’ fees and other expenses incurred as a direct result of the violation.
Rule 11(c)(2), Fed.R.Civ.P. With regard to the amount of a monetary sanction, the Rule states only that the sanctions “shall be limited to what is sufficient to deter repetition of such conduct or comparable conduct by others similarly situated.” Id. And authority interpreting the Rule makes clear that in determining the amount of a monetary sanction, a court must keep in mind that “the primary ... purpose of Rule 11 is to deter future litigation abuse.” In re Kunstler, 914 F.2d at 522-23. To determine the amount of a monetary sanctions, a court should consider four factors: “(1) the reasonableness of the opposing party’s attorney’s fees; (2) the minimum to deter; (3) the ability to pay; and (4) factors related to the severity of the Rule 11 violation.” Id. at 523 (citing White v. General Motors Corp., 908 F.2d 675 (10th Cir. 1990)).
The magistrate judge recommended imposing sanctions of $37,393.57, the amount of defendants’ attorney’s fees, because (i) defendants’ hourly billing rates and the number of hours billed were reasonable, (ii) that amount would deter future violations, (iii) plaintiffs’ financial status does not warrant a reduction in that amount, and (iv) plaintiffs’ Rule 11 violation is severe. While the magistrate judge correctly identified the controlling legal principles, her application of those principles to this ease falls short and leads to a clearly erroneous excessive award. Reduction in the amount of sanctions is warranted chiefly because the magistrate judge granted sanctions to compensate defendants for fees related to all claims brought against plaintiffs, not merely those claims for which sanctions are warranted. Moreover, the magistrate judge’s award includes fees incurred after December 12, 2003, the day the offending claims were dismissed. As such, defendants’ fee claim includes substantial time devoted to claims not the subject of sanctions. In these respects, the magistrate judge’s award runs afoul of both Rule 11 and Fourth Circuit authority that make clear that sanctions based on attorney’s fees may only account for fees incurred in responding to the sanctioned claims.39 Accordingly, the magistrate judge’s recommendation to award sanctions to cover (i) fees incurred after December 12, 2003 or (ii) fees incurred prior to December 12, 2003 for work on claims other than the offending claims, was contrary to law, as those fees were not incurred “as a direct result of the violation.” See Rule 11(c)(2), Fed.R.Civ.P. Reduction in the amount of sanctions is also warranted on the grounds (i) that fees of nearly $40,000 incurred in response to plaintiffs’ patently frivolous claims are plainly excessive and unreasonable 40 and (ii) that such sanctions are well in excess of the amount needed to deter future Rule 11 violations.41
[315]*315Defendants argument that the fees incurred in responding to the claims were necessary and reasonable is unpersuasive as that argument plainly contradicts their contention, accepted here, that the RICO and Sherman Act claims were obviously frivolous. More persuasive is defendants’ argument that plaintiffs’ and plaintiffs’ counsel’s financial status should not be considered here. Although Kunstler stated that a party’s ability to pay is a factor used to determine the amount of sanctions, it is not proper to consider new evidence presented here concerning the financial status of plaintiffs’ and plaintiffs’ counsel as this evidence was not presented to the magistrate judge.42
Although it is clear that the magistrate judge’s recommendation to impose sanctions of $37,393.57 is excessive, the calculation of the proper amount of sanctions is not an arithmetically precise exercise, but instead requires that a court exercise its judgment and discretion in light of the pertinent factors43 and the facts and circumstances presented.44' This is particularly true where, as here, a sanctions award that relies chiefly on the movant’s fees is problematical given that it is often difficult or impossible to distinguish in defendants’ counsel’s billing records between the time spent on the offending claims and the time spent on plaintiffs’ other claims prior to December 12, 2003, when the offending claims were dismissed. Assuming that of the $24,714.24 total fees incurred prior to December 12, 2003, the fees incurred defending against each of plaintiffs’ twelve claims were equivalent, defendants would have incurred only $4,119.04 in responding to the RICO and Sherman Act claims. And, given the patent frivolousness of these claims, it is appropriate to conclude that of the total fees incurred, only a small portion of those fees should have been incurred as a direct result of those claims. Moreover, even if all of defendants’ fees were incurred as a direct result of the offending claims, sanctions of that amount would not necessarily be warranted as “a district court has the discretion... to fashion a sanction. .. which awards part, but not all, of the opposing party’s fee request” for “[a]dequate deterrence may permissibly fall short of full compensation.” Ballentine, 135 F.R.D. at 123 (citing Harris v. Marsh, 679 F.Supp. 1204, 1390 (E.D.N.C.1987)). Yet, it is nonetheless appropriate in this instance to impose sanctions jointly and severally against plaintiffs and plaintiffs’ counsel in the amount of $7500,45 somewhat more than the actual esti[316]*316mated fees incurred, as this amount is necessary (i) adequately to compensate defendants for fees incurred in responding to the offending claims and preparing and presenting the sanctions motion,46 (ii) to ensure specific and general deterrence of future Rule 11 violations, and (iii) effectively to punish plaintiffs and plaintiffs’ counsel for this severe Rule 11 violation. See In re Kunstler, 914 F.2d at 522-23 (citing factors to consider in determining the amount of monetary sanctions); Hannon, 149 F.R.D. at 117 (noting that “Rule 11 sanctions serve many purposes, including punishing the violating party, compensating the victim of the violation, and, most importantly, deterring future violations”) (citing In re Kunstler, 914 F.2d at 522). Moreover, there is no doubt that plaintiffs and plaintiffs’ counsel can afford this amount and will not be driven out of practice or into bankruptcy. See In re Kunstler, 914 F.2d at 524; Harmon, 149 F.R.D. at 119.
Accordingly, for the reasons set forth herein, plaintiffs’ objections to the magistrate judge’s recommendation to impose sanctions jointly and severally against plaintiffs and plaintiffs’ counsel in the amount of $37,393.57 must be sustained in part and overruled in part and sanctions imposed jointly and severally on plaintiffs’ and plaintiffs’ counsel in the amount of $7500.
An appropriate order will issue.