Sandra has just signed a 7-year lease for her new engineering consulting business. The full annual lease amount is due at the beginning of every year. She has agreed to pay 21,018 dollars now for the first year and will increase each subsequent payment by 4% per year until the end of her lease. Given that the market interest rate is 7% per year, compounded monthly, compute the present value of Sandra's lease. (note: round your answer to the nearest cent and do not include spaces, currency signs, or commas)