Determine the amount to be paid in full settlement of each invoice, 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 Freight Terms (a) $4,500 (b) $7,650 Returns and Allowances $1,200 $450 $140 FOB shipping point, 2/10, net 30 FOB destination, 1/10, net 45 $200 a. b