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: Merchandise Invoice Amount Freight Paid by Seller Customer Returns i and Allowances a. $32,000 FOB destination, n/30 $1,600 b. 12,800. $300 C 21,000 FOB shipping point, 2/10, n/30 FOB shipping point, 1/10, n/30 2,500 4,000 d. 9,000 175 FOB shipping point, 2/10, n/30 1,000 77,400 FOB destination, 1/10, n/30 b. 00000 c d.