A friend borrows $17725.09 from you with an annual effective interest rate of i = 8.5%. They intend to repay the loan through 49 payments. The first 48 are monthly payments of $426.75 each, made at the end of every month starting at the end of the first month. The last payment, of $426.75, is made after the 48th payment. Find the time of the 49th payment ?