Exhibit 4.15

		Commercial Note Virginia

IMPORTANT NOTICE

For value received, the borrower(s) named above, whether one or more (the “Borrower”), jointly and severally promise to pay to the order of SunTrust Bank, a Georgia banking corporation (“SunTrust”) at any of its offices, or at such place as SunTrust may in writing designate, without offset in U.S. Dollars in immediately available funds, the Loan Amount shown above, or the total of all amounts advanced under this commercial note and any modifications, renewals, extensions or replacements thereof (this “Note”) if less than the full Loan Amount is advanced, plus interest and any other amounts due, upon the terms specified below.

Page 1 of 7

¨ Payout Requirement for Revolving Line. Borrower agrees that for each twelve-month or 364-day period that this Master Revolving line is available, beginning with the date of this Note, Borrower shall maintain a zero balance outstanding on the line for at least one 30 consecutive day period

x Additional Terms And Conditions

This Note is governed by additional terms and conditions contained in a Agreement to Commercial Note between the Borrower and SunTrust dated April 30, 2010 and any modifications, renewals, extensions or replacements thereof (the “Agreement”), which is incorporated herein by reference. In the event of a conflict between any term or condition contained in this Note and in the Agreement, such term or condition of the Agreement shall control.

Interest

Interest will accrue on a actual/360 basis (calculated on the actual number of days elapsed over a year of 360 days)

Interest shall accrue from the date of disbursement on the unpaid balance and shall continue to accrue until this Note is paid in full.

Subject to the above, interest per annum payable on this Note (the “Rate”) shall be:

¨  Fixed:             % per annum fixed for the term of the loan.

x  Variable: This is a variable rate transaction. The interest rate is prospectively subject to increase or decrease without prior notice and is based on the following Index.

¨ SunTrust Prime Rate, the Prime Rate as established from time to time by SunTrust.

¨ Wall Street Journal Prime, the Prime Rate published in the Money Rates section of the Wall Street Journal from time to time.

x The LIBOR Rate as defined on the attached Addendum A.

¨                                                                                                                                                            .

Page 2 of 7

Note: The “Prime Rate” is a reference for fixing the lending rate for commercial loans. The Prime Rate is a reference rate only and does not necessarily represent the lowest rate of interest charged for commercial borrowings. If the Index is the SunTrust Prime Rate, the Index is subject to increase or decrease at the sole option of SunTrust.

The Rate shall not exceed the maximum rate permitted by applicable law and shall never be less than 3.0% per annum.

¨ Renewal

This Note represents a renewal and amendment of note number      dated or last renewed or extended as of                     ,          executed by Borrower and does not, and is not intended to, constitute a novation of the indebtedness evidenced by such note.

Collateral

Unless otherwise agreed in writing, any collateral pledged to SunTrust to secure any of the existing or future liabilities of the Borrower to SunTrust shall also secure this Note. To the extent permitted by law, the Borrower grants to SunTrust a security interest in and a lien upon all deposits or investments maintained by the Borrower with SunTrust and any affiliates thereof.

The collateral for this Note includes, but is not limited to, the following:

First priority lien on all Accounts, deposit accounts, Inventory, general intangibles, instruments, investment property, letter of credit rights, commercial tort claims, documents, and chattel paper, and with respect to all of the foregoing, without limitation, all goods represented thereby, all accessions thereto, and all goods that may be substituted therefore, reclaimed or repossessed from or returned by account debtors and all proceeds, products, rents and profits thereof, now owned or hereinafter acquired and proceeds thereof.

All of the foregoing security is referred to collectively as the “Collateral”. The Collateral is security for the payment of this Note and any other liability (including overdrafts and future advances) of the Borrower to SunTrust, however evidenced, now existing or hereafter incurred, matured or unmatured, direct or indirect, absolute or contingent, several, joint, or joint and several, including any extensions, modifications or renewals. The proceeds of any Collateral may be applied against the liabilities of the Borrower to SunTrust in such order as SunTrust deems proper.

Loan Purpose And Updated Financial Information Required

The Borrower warrants and represents that the loan evidenced by this Note is being made solely for the purpose of acquiring or carrying on a business, professional or commercial activity or acquiring real or personal property as an investment (other than a personal investment) or for carrying on an investment activity (other than a personal investment activity). The Borrower agrees to provide to SunTrust updated financial information, including, but not limited to, tax returns, current financial statements in form satisfactory to SunTrust, as well as additional information, reports or schedules (financial or otherwise), all as SunTrust may from time to time request.

Representations and Warranties

This Note has been duly executed and delivered by Borrower, constitutes Borrower’s valid and legally binding obligations and is enforceable in accordance with its terms against Borrower. The execution, delivery and performance of this Note and the consummation of the transaction contemplated will not, with or without the giving of notice or the lapse of time, (a) violate any material law applicable to Borrower, (b) violate any judgment, writ, injunction or order of any court or governmental body or officer applicable to Borrower, (c) violate or result in the breach of any material agreement to which Borrower is a party, nor (d) violate Borrower’s charter or bylaws as applicable. No consent, approval, license, permit or other authorization of any third party or any governmental body or officer is required for the valid and lawful execution and delivery of this Note.

Default, Acceleration And Setoff

This section is not applicable to notes payable on demand.

An “event of default” shall occur hereunder upon the occurrence of any one or more of the following events or conditions:

Page 3 of 7

SunTrust shall not be obligated to fund this Note or make any advance under this Note if an event of default exists or would exist if such funding occurred or such advance made. Upon the occurrence of an event of default, SunTrust shall, at its option, have the remedies provided herein and by any other agreement between SunTrust and any Obligor or under applicable law, including without limitation, declaring the entire outstanding principal balance, together with all interest thereon and any other amounts due under this Note, to be due and payable immediately without presentment, demand, protest, or notice of any kind, except notice required by law. Upon the occurrence of an event of default under section g above, the entire outstanding principal balance, together with all interest thereon and any other amounts due under this Note, shall automatically become due and payable without presentment, demand, protest, or notice of any kind except notice required by law, and SunTrust’s obligation to make advances under this Note shall automatically terminate without notice or further action by SunTrust. Upon the occurrence of an event of default, while such default is continuing, SunTrust shall be entitled to interest on the unpaid balance of this Note at the lesser of (a) the Rate plus 4.00% per annum or (b) the maximum rate allowed by law (the “Default Rate”). To the extent permitted by law, upon default SunTrust will have the right, in addition to all other remedies provided herein, to set off the amount due under this Note or due under any other obligation to SunTrust against any and all accounts, whether checking or savings or otherwise, credits, money, stocks, bonds or other security or property of any nature whatsoever on deposit with, held by, owed by, or in the possession of, SunTrust to the credit of or for the account of any Obligor, without notice to or consent by any Obligor. The remedies provided in this Note and any other agreement between SunTrust and any Obligor and by applicable law are cumulative and not exclusive of any other remedies provided by law.

Setoff and Other Remedies Applicable to Notes Payable on Demand

To the extent permitted by law, if payment is not made upon demand, SunTrust will have the right, in addition to all other remedies permitted by law, to set off the amount due under this Note or due under any other obligation of Borrower to SunTrust against any and all accounts, whether checking or savings or otherwise, credits, money, stocks, bonds or other security or property of any nature whatsoever on deposit with, held by, owed by, or in the possession of, SunTrust to the credit of or for the account of any Obligor (as defined below), without notice to or consent by any Obligor. If payment is not made upon demand, Borrower shall be deemed to be in default and SunTrust shall be entitled to interest on the unpaid balance of this Note at the lesser of (a) the Rate plus 4.00% per annum or (b) the maximum rate allowed by law (the “Default Rate”) from the time of demand until paid in full. The remedies provided in this Note and any other agreement between SunTrust and any Obligor and by applicable law are cumulative and not exclusive of any other remedies provided by law.

Late Charges And Other Authorized Fees And Charges

As used herein, the term “Obligor” shall individually and collectively refer to the Borrower and any person or entity that is primarily or secondarily liable on this Note and any person or entity that has conveyed or may hereafter convey any security interest or lien to SunTrust in any real or personal property to secure payment of this Note. If any portion of a payment is at least ten (10) days past due, the Borrower agrees to pay a late charge of 5% of the amount which is past due. Unless prohibited by applicable law, the Borrower agrees to pay the fee established by SunTrust from time to time for returned checks if a payment is made on this Note with a check and the check is dishonored for any reason after the second presentment. In addition to any other amounts owed under the terms of this Note, the Borrower agrees to pay those fees and charges disclosed in the attached Disbursements and Charges Summary which is incorporated in this Note by reference and, as permitted by applicable law, the Borrower agrees to pay the following: (a) all reasonable expenses, including, without limitation, any and all costs incurred by SunTrust related to default, all court costs and out-of-pocket collection expenses and reasonable attorneys’ fees, whether suit be brought or not, incurred in collecting this Note; (b) all costs incurred in evaluating, preserving or disposing of any Collateral granted as security for the payment of this Note, including the cost of any audits, appraisals, appraisal updates, reappraisals or environmental inspections which SunTrust from time to time in its sole discretion may deem necessary; (c) any premiums for property insurance purchased on behalf of the Borrower or on behalf of the owner(s) of any Collateral pursuant to any security instrument relating to any Collateral; (d) any reasonable expenses or costs incurred in defending any claim arising out of the execution of this Note or the obligation which it evidences, or otherwise involving the employment by SunTrust

Page 4 of 7

of attorneys with respect to this Note and the obligations it evidences; and (e) any other reasonable charges permitted by applicable law. The Borrower agrees to pay such amounts on demand or, at SunTrust’s option, such amounts may be added to the unpaid balance of the Note and shall accrue interest at the stated Rate. Upon the occurrence of an event of default, or after demand and failure to pay if this Note is payable on demand, interest shall accrue at the Default Rate.

This Note may be repaid or prepaid in whole or in part without any penalty.

Waivers

The Borrower and each other Obligor waive presentment, demand, protest, notice of protest and notice of dishonor and waive all exemptions, whether homestead or otherwise, as to the obligations evidenced by this Note and waive any discharge or defenses based on suretyship or impairment of Collateral or of recourse. The Borrower and each other Obligor waive any rights to require SunTrust to proceed against any other Obligor or any Collateral before proceeding against the Borrower or any of them, or any other Obligor, and agree that without notice to any Obligor and without affecting any Obligor’s liability, SunTrust, at any time or times, may grant extensions of the time for payment or other indulgences to any Obligor or permit the renewal or modification of this Note, or permit the substitution, exchange or release of any Collateral for this Note and may add or release any Obligor primarily or secondarily liable. The Borrower and each other Obligor agree that SunTrust may apply all monies made available to it from any part of the proceeds of the disposition of any Collateral or by exercise of the right of setoff either to the obligations under this Note or to any other obligations of any Obligor to SunTrust, as SunTrust may elect from time to time. The Borrower also waives any rights afforded by Sections 49-25 and 49-26 of the Code of Virginia of 1950 as amended.

Waiver of Jury Trial

THE BORROWER AND SUNTRUST HEREBY KNOWINGLY, VOLUNTARILY, INTENTIONALLY, AND IRREVOCABLY WAIVE, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, THE RIGHT EITHER OF THEM MAY HAVE TO A TRIAL BY JURY IN RESPECT TO ANY LITIGATION, WHETHER IN CONTRACT OR TORT, AT LAW OR IN EQUITY, BASED HEREON OR ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS NOTE AND ANY OTHER DOCUMENT OR INSTRUMENT CONTEMPLATED TO BE EXECUTED IN CONJUNCTION WITH THIS NOTE, OR ANY COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS (WHETHER VERBAL OR WRITTEN) OR ACTIONS OF ANY PARTY HERETO. THIS PROVISION IS A MATERIAL INDUCEMENT FOR SUNTRUST ENTERING INTO OR ACCEPTING THIS NOTE. FURTHER, THE BORROWER HEREBY CERTIFIES THAT NO REPRESENTATIVE OR AGENT OF SUNTRUST, NOR SUNTRUST’S COUNSEL, HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUNTRUST WOULD NOT, IN THE EVENT OF SUCH LITIGATION, SEEK TO ENFORCE THIS WAIVER OF RIGHT TO JURY TRIAL PROVISION.

Patriot Act Notice

SunTrust hereby notifies Borrower that pursuant to the requirements of the USA PATRIOT Act (Title III of Pub. L. 107-56 signed into law October 26, 2001), SunTrust may be required to obtain, verify and record information that identifies the Borrower, which information includes the name and address of the Borrower and other information that will allow SunTrust to identify the Borrower in accordance with the Act.

Hold Harmless and Indemnification

Borrower hereby indemnifies and agrees to hold SunTrust and its officers, directors, employees, agents and affiliates harmless from and against all claims, damages, liabilities (including attorneys’ fees and legal expenses), causes of action, actions, suits and other legal proceedings (collectively, “Claims”) in any matter relating to or arising out of this Note or any loan document executed in connection with this Note, or any act, event or transaction related thereto or to the Collateral. Borrower shall immediately provide SunTrust with written notice of any such Claim. Upon request of SunTrust, Borrower shall defend SunTrust from such Claims, and pay the attorneys’ fees, legal expenses and other costs incurred in connection therewith, or in the alternative, SunTrust shall be entitled to employ its own legal counsel to defend such Claims at Borrower’s sole expense.

Miscellaneous

All amounts received by SunTrust shall be applied to expenses, late fees and interest before principal or in any other order as determined by SunTrust, in it sole discretion, as permitted by law. Any provision of this Note which is prohibited or unenforceable shall be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions of this Note. No amendment, modification, termination or waiver of any provision of this Note, nor consent to any departure by the Borrower from any term of this Note, shall in any event be effective unless it is in writing and signed by an authorized officer of SunTrust, and then such waiver or consent shall be effective only in the specific instance and for the specific purpose for which given. If the interest Rate is tied to an external index and the index becomes unavailable during the term of this loan, SunTrust may, in its sole and absolute discretion, designate a substitute index with notice to the Borrower. No failure or delay on the part of SunTrust to exercise any right, power or remedy under this Note shall be construed as a waiver of the right to exercise the same or any other right at any time. The captions of the paragraphs of this Note are for convenience only and shall not be deeded to constitute a part hereof or used in construing the intent of the parties. All representations, warranties, covenants and agreements contained herein or made in writing by Borrower in connection herewith shall survive the execution and delivery of this Note and any other agreement, document or writing relating to or arising out of any of the foregoing. All notices or communications given to Borrower pursuant to the terms of this Note shall be in writing and may be given to Borrower at Borrower’s address as stated below or at the top of this Note unless Borrower notifies SunTrust in writing of a different address. Unless otherwise specifically provided herein to the contrary, such written notices and communications shall be delivered by hand or overnight courier service, or mailed by first class mail, postage prepaid, addressed to the Borrower at the address referred to herein. Any written notice delivered by hand or by overnight courier service shall be deemed given or received upon receipt. Any written notice delivered by U.S. Mail shall be deemed given or received on the third (3rd) business day after being deposited in the U.S. Mail. Notwithstanding any provision of this Note or any loan document executed in connection with this Note to the contrary, the Borrower and SunTrust intend that no provision of this Note or any loan document executed in connection with this

Page 5 of 7

Note be interpreted, construed, applied, or enforced in a way that will permit or require the payment or collection of interest in excess of the highest rate of interest permitted to be paid or collected by the laws of the jurisdiction indicated below, or federal law if federal law preempts the law of such jurisdiction with respect to this transaction (the “Maximum Permitted Rate”). If, however, any such provision is so interpreted, construed, applied, or enforced, Borrower and SunTrust intend (a) that such provision automatically shall be deemed revised so as to require payment only of interest at the Maximum Permitted Rate; and (b) if interest payments in excess of the Maximum Permitted Rate have been received, that the amount of such excess shall be deemed credited retroactively in reduction of the then-outstanding principal amount of this obligation, together with interest at the Maximum Permitted Rate. In connection with all calculations to determine the Maximum Permitted Rate, the Borrower and SunTrust intend (a) that all charges be excluded to the extent they are properly excludable under the usury laws of such jurisdiction or the United States, as they from time to time are determined to apply to this obligation; and (b) that all charges that may be spread in the manner provided by statute of the jurisdiction indicated or any similar law, be so spread.

Liability, Successors And Assigns And Choice Of Law

Each Borrower shall be jointly and severally obligated and liable on this Note. This Note shall apply to and bind each of the Borrower’s heirs, personal representatives, successors and permitted assigns and shall inure to the benefit of SunTrust, its successors and assigns. Notwithstanding the foregoing, Borrower shall not assign Borrower’s rights or obligations under this Note without SunTrust’s prior written consent. This Note shall be governed by applicable federal law and the internal laws of the Commonwealth of Virginia. The Borrower agrees that certain material events and occurrences relating to this Note bear a reasonable relationship to the laws of Virginia and the validity, terms, performance and enforcement of this Note shall be governed by the internal laws of Virginia which are applicable to agreements which are negotiated, executed, delivered and performed solely in Virginia. Unless applicable law provides otherwise, in the event of any legal proceeding arising out of or related to this Note, Borrower and SunTrust consent to the jurisdiction and venue of the courts of the City of Roanoke, Virginia, and to the jurisdiction and venue of the United States District Court for the Western District of Virginia and further waive and agree not to assert that Borrower or SunTrust are not personally subject to the jurisdiction of such courts, that proceeding is brought in an inconvenient forum or that venue is improper.

Transfer of Loan

SunTrust may, at any time, sell, transfer or assign the Note, the related security instrument and any related loan documents, and any or all servicing rights with respect thereto, or grant participations therein or issue mortgage pass-through certificates or other securities evidencing a beneficial interest in a rated or unrated public offering or private placement (the “Securities”). SunTrust may forward to each purchaser, transferee, assignee, servicer, participant, or investor in such Securities or any Rating Agency (as hereinafter defined) rating such Securities (collectively, the “Investor”) and each prospective Investor, all documents and information which SunTrust now has or may hereafter acquire relating to the Borrower, any loan to Borrower, any guarantor or the property, whether furnished by Borrower, any guarantor or otherwise, as SunTrust determines necessary or desirable. The term “Rating Agency” shall mean each statistical rating agency that has assigned a rating to the Securities.

By signing below, the Borrower agrees to the terms of this Note and the disbursement of proceeds as described in the Disbursements and Charges Summary form provided in connection with this transaction.

Page 6 of 7

Borrower’s Billing Address, if different from address indicated at the top of this Note:

Page 7 of 7