Hello, I need help with my accounting homework. I had surgery, so my brain isn't working so well.

Only b and c need to be answered.

EX 6-13 Determining amounts to be paid on invoice:s 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 OBJ. 2 Freight Customer Returns and Allowances Merchandise 14,000 21,200 16,400 7,500 28,800 Paid by Seller $380 250 FOB destination, n/30 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 $3,250 4,000 900 1,200 b. C