REl sells snowboards. Assume the following information relates to RElls purchases of snowboards during September. During the sarne month, 104 snowboards were sold. REl uses a periodic inventory system. (a) Compute the ending imventory at September 30 using FIFO, LIFO, and average-cost. (Round averose cost per unit to 3 decimal pleces, e.5. 125.153 and final onswers to 0 decimal places, es. 125.)