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 Freight Paid by seller Returns and Allowances $18, 900 FOB destination, n/30 $900 11, 800 $500 FOB shipping point, 1/10, n/30 1, 400 7, 600 FOB shipping point, 2/10, n/30 700 3, 600 100 FOB shipping point, 1/10, n/30 500 2, 500 FOB destination, 2/10, n/30