You estimate that you will need $7400 at the start of each month of your retirement. You estimate a retirement period of 20 years. What is the minimum amount you must invest at the end of each month during your working years in order to meet this retirement goal? Assume a working life of 40 years, and a return on your investments of 7.5% over the entire planning horizon of 60 years.

A. $349.72

B. $395.12

C. $305.68

D. $373.15