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. Compute the ending inventory at September 30 using FIFO, LIFO, and average-cost. (Round average cost per unit to 3 decimal places, eg. 125.153 and final answers to 0 decimal places, e.g. 125.) (b) The parts of this question must be completed in order. This part will be available when you complete the part above