The correct equation to calculate the equivalent amount of money "F" that can be spent 15 years from now in lieu of spending $25,000 now at an interest rate of 18% per year is: F= 25,000(F/P, 15%, 18) F= 25,000(P/F, 18%, 15) F- 25,000(P/A, 18%, 15) F= 25,000(F/P, 18%, 15)