Reese, Judge. Pure Hospitality Solutions, Inc. (“Appellant”) appeals from the trial court’s grant of a default judgment to Joseph Canouse (“Appellee”), who had sued the Appellant after it defaulted on a promissory note. The Appellant contends that the trial court erred in finding that the note provided for liquidated damages, in failing to conduct an evidentiary hearing to determine the amount of unliquidated damages arising from the default, and in awarding attorney fees. For the reasons set forth, infra, we affirm the trial court’s grant of a default judgment to the Appellee on the issue of the Appellant’s liability on the Note, but we vacate the court’s award of damages, interest, and attorney fees to the Appellee, and we remand this case for an evidentiary hearing on those issues.The record shows the following undisputed facts. On May 12, 2015, the Appellant executed a $25,000 Convertible Note (“Note”) in favor of Tarpon Bay Partners, LLC (“Tarpon Bay”). The Note contained a provision that allowed Tarpon Bay, as the holder of the Note, to convert all or a portion of the amount due on the Note into shares of common stock in the Appellant. The Note required the Appellant to “reserve and keep available” at least thirty million (30,000,000) shares of common stock in case Tarpon Bay decided to exercise its conversion option. In addition, the Note included a provision assessing $1,000 per day in late fees if the Appellant failed to comply with a notice of conversion submitted by Tarpon Bay. On January 23, 2017, Tarpon Bay executed a “Notice of Conversion” (the “January Conversion Notice”) seeking to convert $25,610.27 of the outstanding principal and accrued interest on the Note, plus fees, into 256,102,700 conversion shares of the Appellant’s common stock. According to the notice, upon completion of the conversion, the outstanding balance on the Note would be $4,500. Although the Appellant did not respond to or honor the January Conversion Notice, Tarpon Bay took no further action to compel the Appellant to do so or to otherwise complete the conversion.On June 6, 2017, Tarpon Bay sold and assigned the Note to the Appellee. The assignment stated that the Appellant was in default on the Note and that the outstanding amount due on the Note was approximately $31,178.08. The next day, the Appellee executed a “Conversion Notice” (the “June Conversion Notice”) in which he sought to convert $34,000 in principal he claimed was due on the Note into 340,000,000 shares of the Appellant’s common stock. In response to the notice, the Appellant’s Chief Executive Officer sent the Appellee an e-mail informing him that “the issuer [did] not have enough shares at treasury[ ]” to execute the conversion. On August 16, 2017, the Appellee filed a verified complaint against the Appellant for breach of contract and theft by conversion. Attached to the complaint were several documents, including the Note, the conversion notices, and the assignment. According to the complaint, the Appellant’s failure to honor the June Conversion Notice damaged the Appellee in an amount not less than $68,000, i.e., the alleged value of 340,000,000 shares traded at a rate of $0.0002 per share.[1] In addition, according to the complaint, the Appellant’s failure to honor the January Conversion Notice entitled the Appellee to $1,000 per day in late fees for 202 days, totaling $202,000 in liquidated damages under the Note. The complaint also sought attorney fees pursuant to OCGA §§ 13-1-11 and 13-6-11.On September 14, 2017, the Appellee filed a “Notice of Filing of Proof of Service” showing that the Appellant had been served with process on September 1, 2017, at the address of its registered agent. The Appellant did not file a responsive pleading by the due date, October 2, 2017, nor did it move to open default within the 15-day period that expired on October 17, 2017.[2] On October 27, 2017, the Appellee filed a motion for a default judgment for liquidated damages in the amount of $68,000 in principal; $202,000 in late fees accrued since January 26, 2017; pre- and post-judgment interest; and attorney fees pursuant to OCGA § 13-1-11. On November 6, 2017, the trial court issued an order granting a default judgment to the Appellee. In the same order, the court found that all of the damages sought by the Appellee were liquidated and awarded him $282,501.61, plus post-judgment interest. This appeal followed.[3]OCGA § 9-11-55 (a) provides, in relevant part, as follows: If in any case an answer has not been filed within the time required by this chapter, the case shall automatically become in default unless the time for filing the answer has been extended as provided by law. The default may be opened as a matter of right by the filing of such defenses within 15 days of the day of default, upon the payment of costs. If the case is still in default after the expiration of the period of 15 days, the plaintiff at any time thereafter shall be entitled to verdict and judgment by default, in open court or in chambers, as if every item and paragraph of the complaint or other original pleading were supported by proper evidence, without the intervention of a jury, unless the action is one ex delicto or involves unliquidated damages, in which event the plaintiff shall be required to introduce evidence and establish the amount of damages before the court without a jury, with the right of the defendant to introduce evidence as to damages[.]Thus, “a defendant in default is in the position of having admitted each and every material allegation of the plaintiff’s petition except as to the amount of damages alleged. The default concludes the defendant’s liability, and estops him from offering any defenses which would defeat the right of recovery.”[4]“Since this appeal involves questions of law concerning the nature of damages in [the Appellee's] complaint and the trial court’s entry of default judgment for liquidated damages, this Court must review the record de novo and apply a ‘plain legal error’ standard of review.”[5] With these guiding principles in mind, we turn now to the Appellant’s specific claims of error. 1. As an initial matter, the Appellant does not challenge the trial court’s grant of a default judgment on the issue of its liability on the Note. Consequently, that ruling is affirmed by operation of law.[6]2. The Appellant contends that the trial court erred in finding that the Appellee’s damages were liquidated and in awarding such damages without conducting an evidentiary hearing, pursuant to OCGA § 9-11-55 (a),[7] to determine the amount to which the Appellee was entitled. In response, the Appellee argues that his complaint and the documents attached thereto (collectively, “the pleadings”) established all of the necessary facts to support his claim and that the trial court was able to calculate the specific amount of damages to be awarded by applying the mathematical formula[8] in the Note to those facts.When a trial court issues a default judgment against a defendant, “the default operates to admit only the well-pled factual allegations of the complaint and the fair inferences and conclusions of fact to be drawn from those allegations. . . . It is axiomatic that a default does not result in the admission of allegations that are not well-pled or that are the result of forced inferences.”[9]In order for damages to be considered “liquidated,” the damages must be an amount that iscertain and fixed, either by the act and agreement of the parties, or by operation of law; a sum which cannot be changed by proof; it is so much or nothing. On a motion for default judgment, the amount of damages must be ascertainable from the pleadings. Mere conclusory allegations of the amount owed are insufficient to render the damages liquidated; otherwise every case where a specific amount is stated in the complaint as due and owing would be turned into a liquidated amount by the default.[10] Further,[f]or the [trial] court to conclude upon default that damages are liquidated and dispense with an evidentiary hearing on damages, the plaintiff must have alleged facts sufficient to show how the amount of damages claimed was calculated, or the plaintiff must attach to his complaint the relevant contract, invoices, or other documents demonstrating that the plaintiff is due the amount claimed.[11](a) In the instant case, we find that there are material conflicts in the pleadings that have to be resolved before the trial court can calculate the value of the stock on the day the Appellee submitted the June Conversion Notice and can award that amount as damages. For example, the Appellee’s complaint asserted that, on June 7, 2017, he had been entitled to convert $34,000 in “principal” due on the Note into 340,000,000 shares of common stock; that the shares were traded at a “daily average of $0.0002″; and that, as a result, he was entitled to damages “in an amount to be proven at trial, but not less than $68,000,” or 340,000,000 multiplied by $0.0002. However, the assignment of the Note from Tarpon Bay to the Appellee stated that it was a “Notice of Sale and Assignment of Notes, Interest, Default and other Obligations”; that the Appellant was in default on the Note; and that the amount of the Appellant’s “obligations” under the Note totaled approximately “$31,178.08″ as of June 6, 2017. Thus, the pleadings do not show that, on June 7, 2017, the Appellee was entitled to convert $34,000 of “principal” into common stock, given that that amount exceeded the total amount then due on the Note.In addition, the complaint’s assertion that, in June 2017, the shares “traded at a daily average of $0.0002″ was unsupported by any documentation and, thus, was merely a conclusory allegation that does not support a finding that the damages were liquidated.[12] Moreover, according to the complaint, the Appellee was entitled to damages “in an amount to be proven at trial, but not less than $68,000.00[,]” which showed that the Appellee had merely estimated the amount of damages he claimed were due. Under these circumstances, the pleadings did not show that the amount of damages that arose from the Appellant’s failure to honor the Appellee’s June Conversion Notice were “ certain and fixed” or “a sum which cannot be changed by proof[.]“[13] Consequently, the trial court erred in concluding that those damages were liquidated and in awarding those damages in its order granting the Appellee a default judgment.[14] (b) Additional evidentiary conflicts are evident in the Appellee’s claim for $202,000 in late fees as liquidated damages.[15] That claim was based upon the 202 days that had passed between January 26, 2017, the date the Appellant failed to honor the January Conversion Notice submitted by Tarpon Bay (the Appellee’s predecessor-in-interest), and August 16, 2017, the date the Appellee filed his complaint. However, the Appellee’s pleadings do not show that the Appellee was entitled to late fees based upon the January Conversion Notice, when he sued for damages based upon the June Conversion Notice. Moreover, the Note expressly required the Appellant either (1) to pay the late fees to Tarpon Bay on a monthly basis following its default on the January Conversion Notice, or (2) upon written request by Tarpon Bay, to add the late fees to the principal amount due on the Note.[16] The Appellee’s pleadings are silent, however, on whether the Appellant paid the late fees to Tarpon Bay prior to Tarpon Bay’s assignment of the Note to the Appellee in June 2017. Further, the pleadings do not show that Tarpon Bay gave the required written notice to the Appellant to add the late fees to the amount due on the Note. On the contrary, the pleadings clearly show that the Appellant’s total “obligations” on the Note on June 6, 2017, the date Tarpon Bay assigned the Note to the Appellee, were only about $31,178.08, instead of the approximately $162,000 that would have been due at the time of the assignment if the late fees for 131 days (January 26 to June 6, 2017) had been added to the amount due on the Note. Thus, the pleadings do not establish a “certain and fixed” amount of late fees to which the Appellee was entitled.[17]Under these circumstances, we find that the damages and late fees to which the Appellee was entitled were not liquidated and that, as a result, the trial court erred in awarding such damages to the Appellee without conducting an evidentiary hearing, as required by OCGA § 9-11-55 (a).[18] We vacate the trial court’s award of damages and late fees to the Appellee and remand this case for such hearing. 3. The Appellant contends that the court erred in awarding $5,160.55 in interest to the Appellee as liquidated damages. The Appellant argues that the Appellee’s complaint failed to assert a claim for interest due on the Note, nor did the complaint allege the facts necessary to calculate a certain and fixed amount of interest due as liquidated damages. In addition, the Appellant argues that the trial court erred in awarding such interest under OCGA § 13-6-13.[19]In response, the Appellee admits that his citation to OCGA § 13-6-13 in his motion for a default judgment was a mistake. Even so, he asserts that OCGA § 7-4-15[20] authorized the award and that this Court should affirm the award under the “right for any reason” rule.[21] By its plain language, however, OCGA § 7-4-15 applies to an award of “liquidated demands” for damages. For the reasons explained in Division 2, supra, it necessarily follows that OCGA § 7-4-15 did not authorize the court’s award of interest in this case. More importantly, under the express language of the Note, the calculation of interest that was due was dependent on the “Outstanding Principal Amount,”[22] and that amount must be determined by the trial court following a hearing on remand, as explained in Division 2, supra. Consequently, the trial court’s award of interest must be vacated.4. The Appellant also contends that the trial court erred in awarding attorney fees under OCGA § 13-1-11 (a) (2), because the amount of the fees awarded was based on the court’s improper award of unliquidated damages.OCGA § 13-1-11 (a) (2) provides as follows: Obligations to pay attorney’s fees upon any note or other evidence of indebtedness, in addition to the rate of interest specified therein, shall be valid and enforceable and collectable as a part of such debt if such note or other evidence of indebtedness is collected by or through an attorney after maturity, subject to subsection (b) of this Code section and to the following provision[:] If such note or other evidence of indebtedness provides for the payment of reasonable attorney’s fees[[23]] without specifying any specific percent, such provision shall be construed to mean 15 percent of the first $500.00 of principal and interest owing on such note or other evidence of indebtedness and 10 percent of the amount of principal and interest owing thereon in excess of $500.00[.]In this case, the Note contained the following provision concerning attorney fees: “If one or more of the ‘Events of Default’ as described above shall occur, the Company agrees to pay all costs and expenses, including reasonable attorney’s fees, which the Holder may incur in collecting any amount due under, or enforcing any terms of, this Note.” Thus, the Note did not “specif[y] any specific percent”[24] that the Appellee was entitled to in attorney fees in the event of a default. It follows that, in order to determine the amount of attorney fees due in this case, the trial court must first ascertain the amount of principal and interest owed on the Note, and then apply the calculation from OCGA § 13-1-11 (a) (2) to that amount. Because, as explained in Divisions 2 and 3, supra, the amount of principal and interest to which the Appellee is entitled needs to be determined by the trial court upon remand, the court’s award of attorney fees, which are dependent on that determination, must be vacated.5. In a related argument, the Appellant contends that the trial court erred when it awarded attorney fees under a Georgia statute, OCGA § 13-1-11, when the Note contained a forum selection clause stating that it “shall be governed by and construed in accordance with the laws of the State of Connecticut.” To the extent the Appellant is arguing that the trial court must apply Connecticut law regarding attorney fees following remand by this Court, we disagree. Because forum selection clauses involve procedural rights, we apply Georgia law even though the agreement also contains a provision dictating that it be governed by the laws of [Connecticut]. Forum selection clauses, such as the one in the case at bar, in which the parties consent to the jurisdiction of a given state[,] address not subject-matter jurisdiction, but rather personal jurisdiction.[[25]] While we have held on numerous occasions that such forum selection clauses are prima facie valid[,] such clauses are essentially no more than contractual provisions, and as such may be waived. . . . [Thus, the Appellant] waived the clause when it failed to file an answer or motion to dismiss and allowed the entry of a default judgment.[26]Based on the foregoing, the trial court is authorized to apply Georgia law when considering whether to award attorney fees on remand.Judgment affirmed in part and vacated in part, and case remanded with direction. Barnes, P. J., and McMillian, J., concur.