Riverbed Corp uses a periodic inventory system. Its records show the following for the month of May, in which 75 units were sold. Date Explanation Units Unit Cost Total Cost May 1 Inventory $224 15 Purchase 23 9 10 207 360 24 Purchase - 36 Total _87 __ $791 Calculate the ending inventory at May 31 using the FIFO, LIFO and average-cost methods. (Round answers to O decimal places, e.g. 125.) FIFO LIFO AVERAGE-COST The ending inventory at May 31 $ 120 96 $ 9.092