Martinez Corp, uses a periodic inventory system. Its records show the following for the month of May, in which 72 units were sold. Date Explanation Units Unit Cost Total Cost May 1 Inventory 35 $9 $315 15 Purchase 25 10 250 24 Purchase 40 11 440 Total 100 $1,005 Calculate the weighted average unit cost. (Round answer to 3 decimal places, e.g. 5.125.) Weighted-average unit cost $ e Textbook and Media 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 $ $ $ Touthook and Modis