Under Your Current Cash Sales Only Policy You Sell 170

Under your current cash sales only policy you sell 170 units a month at a price of $42. Your variable cost per unit is $28 and your monthly interest rate is 1.25 percent. Based on a recent survey, you
Believe that you can sell an additional 60 units per month if you offer a net 30 credit policy. What is
The net present value of the switch using the one-shot approach?

A) $57,659
B) $58,380
C) $60,420
D) $61,860
E) $63,333