Determining Amounts to be Pald on Invoices Determine the amount to be paid in full settlement of each of the following involces, assuming that credit for returns and allowances was received prior to payment and that all invoices were paid within the credit period. a. b. x c. d. e. . 5 3 rotaky Wors FOB shipping point freight is the buyer's cost, FOB destination freight is the seller's expense. To determine the amount, first deduct the return before calculating the discount. Then calculate (Purchase - Return - Discount) + Applicable Freight