Currently, Tyler Enterprises Sells 350 Units a Month at a Price

Currently, Tyler Enterprises sells 350 units a month at a price of $42 a unit. The company thinks they can increase sales by an additional 100 units if they switch to a net 30 credit policy. The
Monthly interest rate is .4 percent and the variable cost per unit is $22. What is the incremental
Cash inflow of the proposed credit policy switch?

A) $1,480
B) $2,000
C) $2,200
D) $2,520
E) $4,200