Your firm currently sells 500 units a month at a price of $75 a unit. You think you can increase your sales by an additional 130 units if you switch to a net 30 credit policy. The monthly interest rate is .4 percent and your variable cost per unit is $35. What is the incremental cash inflow from the proposed credit policy switch?

Select one:

a. $6,000

b. $2,400

c. $3,600

d. $5,200

e. $1,800