Current Attempt in Progress REI sells snowboards. Assume the following information relates to REI's purchases of snowboards during September. During the same. month, 109 snowboards were sold. REl uses a periodic inventory system. (a) Compute the ending inventory at September 30 using FiFO, LFO. and average-cost. (Round averege coit per init to 3 dedinal ploces: es. 125.153 and final answers to 0 decimal places, es. 125.)