Currently, your firm sells 600 units a month at a price of $100 a unit. You think you can increase your sales by an additional 400 units if you switch to a net 30 credit policy. The monthly interest rate is 0.7% and your variable cost per unit is $72. What is the incremental cash inflow of the proposed credit policy switch? (Do not use the $ sign. If your answer is $1,234.56, enter 1234.56)