A sales invoice included the following information: merchandise price, $18,000; terms 1/10, n/eom; FOB shipping point with prepaid freight of $1,000 added to the invoice. Assuming that a credit for merchandise returned of $1,300 is granted prior to payment and that the invoice is paid within the discount period, what is the amount of cash that should be received by the seller? (Please round your answer to the nearest whole number.)