Paul intends to retire in 15 years and would like to receive $1,500 every month for 20 years, starting at the end of the first month in which he retires. How much must he have at the beginning of retirement if interest is 5% compounded annually? Select one: a. $191,834.03 b. $229,415.16 c. $228,235.00 d. $227,287.97 e. $230,349.83