Carla Vista Co.uses a periodic inventory system. Its records show the following for the month of May, in which 70 units were sold. Date Units Unit Cost Explanation Inventory Purchase May 1 15 $8 37 24 39 Total Cost $296 216 390 9 24 Purchase 10 Total 100 $902 Calculate the weighted average unit cost. (Round answer to 3 decimal places, e.g. 5.125.) Weighted average unit cost $ Calculate the ending inventory at May 31 using the FIFO, LIFO and average-cost methods. (Round answers to 0 decimal places, e.g. 125.) FIFO LIFO AVERAGE-COST The ending inventory at May 31 $ $ $