Exercise 6-5 Ballas Co. uses a periodic inventory system. Its records show the following for the month of May, in which 181 units were sold 80 67 24Purchases 9S 240 Unit Units Cost $14 17 18 Total Cost $1,120 1,139 1,674 $3,933 May 1 Inventory 15 Purchases 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