Find the monthly payment R needed to have a sinking fund accumulate the future value A. The yearly interest rate r and the time t in years are given below. Interest is compounded monthly. A=$6,000; r= 9.5%; t=1 R=$|:| (Round up to the nearest cent.) Use the formula for the future value of an ordinary annuity to solve for n when A: $16,500, the monthly payment R = $500, and the annual interest rate r = 7.5%. n = I: (Round up to the nearest integer as needed.) Kanye wants to save $15,000 in 7 years by making monthly payments into an ordinary annuity for a down payment on a condominium at the shore. If the annuity pays 0.8% monthly interest, what will his monthly payment be? His monthly payment will be 15 (Round up to the nearest cent.)