Swifty Corporation uses a periodic inventory system. Its records show the following for the month of May, in which 72 units were sold Unit Cost $10 13 14 Total Cost $330 364 546 $1,240 Units 33 28 24 Purchases 39 100 May 1 Inventory 15Purchases Totals Compute the ending inventory at May 31 and cost of goods sold using the FIFO and LIFO methods FIFO LIFO Ending inventory at May 31 Cost of goods sold