Determining Amounts to be paid on Invoices Determine the amount to be paid in full settlement of each of the following invoices, assuming that credit for returns and allowances was received prior to payment and that all invoices were paid within the discount period: Customer Freight Paid by Seller Returns and Allowances Merchandise a. $20,500 FOB destination, n/30 $4,800 b. 31,100 $560 FOB shipping point, 2/10, n/30 5,900 C. 24,000 FOB shipping point, 1/10, n/30 1,300 d. 11,000 370 FOB shipping point, 2/10, n/30 1,800 e. 42,200 FOB destination, 1/10, n/30