Shown below is the sales forecast for Cooper Inc. for the first four months of the coming year Cash sales Credit sales Jan $15,000 $100,000 Feb $24,000 $120,000 Mar $21,000 $90,000 Apr $14,000 $70,000 On average, 50% of credit sales are paid for in the month of the sale, 30% in the month following sale, and the remainder are paid two months after the month of the sale. Assuming there are no bad debts, the expected cash inflow in March is: