12. Calculating Perpetuity Values (LO1) In the previous problem, suppose a sales associate told you the policy costs $475,000. At what interest rate would this be a fair deal? 41. Calculating the Number of Payments (LO2) You're prepared to make monthly payments of $290, beginning at the end of this month, into an account that pays 7% interest compounded monthly. How many payments will you have made when your account balance reaches $20,000 ? Calculating Annuities (LO1) You are planning to save for retirement over the next 30 years. To do this, you will invest $800 a month in a stock account and $400 a month in a bond account. The return of the stock account is expected to be 10%, and the bond account will pay 6%. When you retire, you will combine your money into an account with a 9% return. How much can you withdraw each month from your account assuming a 25 -year withdrawal period? Assume that the APR is compounded monthly