Current Attempt in Progress REI sells snowboards. Assume the following information relates to REI's purchases of snowboards during September. During the same month 102 snowboards were sold. REl uses a periodic inventory system. (a) Compute the ending Inventory at September 30 using FIFO, LIFO, and average-cost (Round ovenese cost per unit to 3 decimal ploces, es. 125.153 and final antwers to 0 diclonal places, es. 125) eTextbook and Media Attemptsi 0 of 3 used (b)