Pharoah Inc. uses a periodic inventory system. Its records show the following for the month of May, in which 68 units were sold. Calculate the weighted-average unit cost. (Round onswer to 3 decimal places, e-8. 5.125.) Weighted-average unit cost Calculate the weighted-average unit cost. (Round answer to 3 decimal places, eg. 5.125.) Weighted-average unit cost eTextbook 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.)