Skysong Company uses a periodic inventory system. For April, when the company sold 420 units, the following information is available. Units Unit Cost Total Cost April 1 inventory 240 $13 $ 3,120 April 15 purchase 440 16 7,040 April 23 purchase 320 17 5,440 1,000 $15,600 Compute the April 30 inventory and the April cost of goods sold using the FIFO method.