Clark Company uses the gross method and a perpetual inventory system. Assuming the following entries, compute the amount that Clark Company received on September 21. September 10 Sold goods costing $4, 800 to Hayes Company on account, $8,000, terms 3/10, n/30. The goods are shipped FOB Shipping Point. Freight Prepaid by Seller, $230. September 16 Hayes Company returned undamaged merchandise previously purchased on account, $800. September 21 Received the amount due from Hayes Company