Co. a periodic inventory system. Its records show the following for the month of May, in which 97 units were sold. Xong uses Units Unit Cost Total Cost May 1 Inventory 45 $360 15 purchases 407 24 Purchases 52 624 Totals 134 1,391 Compute the ending inventory at May 31 and cost of goods sold using the FI and uFo methods. The ending inventory at May 31 Cost of goods sold