(Present value of complex cash flows) How much do you have to deposit today so that beginning 11 years from now you can withdraw $9,000 a year for the next 4 years (periods 11 through 14) plus an additional amount of $18,000 in the last year (period 14)? Assume an interest rate of 6 percent. The amount of money you have to deposit today is $ . (Round to the nearest cent.)