A Pension Fund Has to Pay Out $750,000 to the Retirees

A pension fund has to pay out $750,000 to the retirees at the end of every month for the next 50 years. The fund will be earning 9.6% compounded monthly for the first 30 years and 7.2% compounded monthly for the last 20 years. In order to be able to make these payments, how much money would have to be in the pension fund now?

A) $86,591.739
B) $183,683,039
C) $37,500,000
D) $148,521,416
E) $93,835,532