Concord Company uses a periodic inventory system. For April, when the company sold 550 units, the following information is available. Units Unit Cost Total Cost April 1 inventory 260 $ 15 $3,900 April 15 purchase 430 18 7,740 April 23 purchase 310 20 6,200 1,000 $ 17,840 Compute the April 30 inventory and the April cost of goods sold using the FIFO method. Ending inventory $ Cost of goods sold $