Please show work and formulas!

Sweet Music sells 915 musical instruments a year at an average price per instrument of $870. All sales are credit sales with terms of 2/10, net 40. Hogan's has found that 87 percent of its customers take advantage of the discounted price. What is the amount of the firm's average accounts receivable? The discount amount is applied to a customer's account only after payments have been received and processed. Assume a 365-day year. $29,560 $30,315 $31,280 $32,620 $32,440