(Present value of complex cash flows) How much do you have to deposit today so that beginning 11 years from now you can withdraw $10,000 a year for the next 5 years (periods 11 through 15) plus an additional amount of $20,000 in the last year (period 15)? Assume an interest rate of 6 percent. The amount of money you have to deposit today is $(Round to the nearest cent.)