Interest shall accrue on the unpaid principal balance and any unpaid late fees or other fees under this Note at a rate of ten percent (10%) per annum from the Purchase Price Date (as defined in the Company Note) until the full amount of the principal and fees has been paid. Interest shall be computed on the basis of a 360-day year comprised of twelve (12) thirty (30) day months, shall compound daily and shall be payable in accordance with the terms of this Note.. Notwithstanding any provision to the contrary herein, in no event shall the applicable interest rate at any time exceed the maximum interest rate allowed under applicable law, as provided in Section 12 below. The entire unpaid principal balance and all accrued and unpaid interest, if any, under this Note, shall be due and payable on the date that is fifteen (15) months from the date hereof (the “ Investor Note Maturity Date ”); provided, however , that Investor may elect, in its sole discretion, to extend the Investor Note Maturity Date for up to thirty (30) days by delivering written notice of such election to Company at any time prior to the Investor Note Maturity Date.