EX 6-13. 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: PPSSP Merchandise Freight Paid by Seller Customer Refunds and Allowances $20,500 31,100 FOB destination, n/30 $4,800 $560 24,000 11,000 370 42,200 FOB shipping point, 2/10, n/30 FOB shipping point, 1/10, n/30 FOB shipping point, 2/10, n/30 FOB destination, 1/10, n/30 5,900 1,300 1,800