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 returns and allowances was received prior to payment and that all invoices were paid within the discount period. Freight Paid by Seller Returns and Merchandise Allowances a. $15,400 12,500 7,100 2,800 2,900 FOB destination, n/30 FOB shipping point, 2/10, n/30 FOB shipping point, 1/10, n/30 FOB shipping point, 2/10, n/30 FOB destination, 2/10, n/30 $800 1,500 600 400 b. $500 d. 100 d. $