Shamrock, Inc. uses a periodic inventory system. Its records show the following for the month of May, in which 74 units were sold. Date Units Unit Cost 33 $9 May 1 15 Explanation Inventory Purchase Purchase Total Total Cost $297 270 27 10 24 40 11 440 100 $1,007 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 O decimal places, e.g. 125.) FIFO LIFO AVERAGE-COST The ending inventory at May 31 $ $ e Textbook and Media