here is my work... can someone help? I keep getting the wrong answer

Return to question Bally Manufacturing sent Intel Corporation an invoice for machinery with a $13,500 list price. Bally dated the invoice July 28 with 5/10 EOM terms. Intel receives a 20% trade discount. Intel pays the invoice on August 10. On August 06, Intel Corporation returns $600 of the machinery due to defects. What does Intel pay Bally on August 10? 5.92 points Answer is complete but not entirely correct. Payable amount $ 10,800 17 Bally Manufacturing sent Intel Corporation an invoice for machinery with a $13,500 list price. Bally dated the invoice July 28 with 5/10 EOM terms. Intel receives a 20% trade discount. Intel pays the invoice on August 10. On August 06, Intel Corporation returns $600 of the machinery due to defects. What does Intel pay Bally on August 10? $10,800 SO... payable amt on Aug 10: GIVEN list price dated EOM Terms $13,500 July 28 5/10 20% Aug 6 $600 Aug 10 net invoice = total invoice - returned goods net invoice = $12,900.00 Intel pays = net invoice - trade discount intel pays = $10,800 "=C166-C166*C169" trade discount return date return price pymt date