Ballas Co. uses a periodic inventory system. Its records show the following for the month of May, in which 133 units were sold Unit Cost $14 17 18 Units Total Cost 59 15 Purchases 49 24 Purchases 69 May 1 Inventory $826 833 1,242 $2,901 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 31 686 Cost of goods sold 2019 2215