Current Attempt in Progress Sheridan Inc. uses a periodic inventory system. Its records show the following for the month of May, in which 79 units were sold. (a1) Calculate the weighted-average unit cost. (Round answer to 3 decimal places, e.g. 5.125.) Weighted-average unit cost \$ eTextbook and Media Current Attempt in Progress REI sells snowboards. Assume the following information relates to REl's purchases of snowboards during September. During the same month, 106 snowboards were sold. REl uses a periodic inventory system. (a) Your answer is incorrect. Compute the ending inventory at September 30 using FIFO, LIFO, and average-cost. (Round average cost per unit to 3 decimal places, e.g. 125.153 and final answers to 0 decimal places, e.g. 125.) eTextbook and Media Last saved 12 minutes ago. Attempts: 1 of 3 used Saved work will be auto-submitted on the due date. Autosubmission can take up to 10 minutes. (b) The parts of this question must be completed in order. This part will be available when you complete the part above