An invoice received included the following information: merchandise price, $10,400; terms 1/10, n/eom; FOB shipping point with prepaid freight of $423. Assuming that a credit for merchandise returned of $2,100 is granted prior to payment and that the invoice is paid within the discount period, what amount of cash should be paid by the buyer? a.$2,100 b.$10,400 c.$8,640 d.$10,715