answer A and B please

Freight Terms Determine the amount to be paid in full settlement of each of two invoices, (a) and (b), assuming that credit for returns and allowance was received prior to payment and that all invoices were paid within the discount period. Returns and Allowances (Invoice Amount) Merchandise (Involce Amount) $24,000 31,500 Freight Pald by Seller $300 250 Freight Terms FOB destination, 1/10, 1/30 FOB shipping point, 2/10, 1/30 $2,000 2,500