Ayayai Inc. uses a perpetual inventory system. Its records show the following for the month of May. Unit Cost Total Cost Date Explanation Units May 1 Inventory 32 $ 9 $ 288 May 15 Purchase 23 10 230 May 18 Sale (47) May 24 Purchase 36 11 396 Total 91 $ 914 (a) Calculate the cost of goods sold for May and the ending inventory at May 31 using the FIFO formula. Cost of goods sold $ Ending Inventory $ Calculate the cost of goods sold for May and the ending inventory at May 31 using the average cost formula. (For average, use 3 decimal places, e.g. 15.235 in your calculations and round final answers to 3 decimal places, e.g 5.255.) Cost of goods sold $ Ending Inventory $