Yellow company is considering relaxing its' credit terms from 50 to 60 days. That is expected to increase sales by 7,000 units knowing that profit per unit is $2, increase bad debts by S4,000, and increase the opportunity cost of tying up funds in receivables by $2,000. Calculate the marginal profit. O a. 7100 O b. 4500 O c. 8000 O d. Other