Sanders Company uses the gross method and a perpetual inventory system. Assuming the following entries, compute the amount that Sanders Company received on March 15. March 4 Sold goods costing $4,200 to Long Company on account, $7,000, terms 4/10, n/30. The goods are shipped FOB Shipping Point, Freight Prepaid by Seller, $270. March 10 Long Company returned undamaged merchandise previously purchased on account, $700. March 15 Received the amount due from Long Company. Amount due from Long Company on March 15: $0 ?