REI sells snowboards. Assume the following information relates to REl's purchases of snowboards during September. During the same month, 105 snowboards were sold. REI uses a periodic inventory system. (a) Your answer is incorrect. Compute the ending inventory at September 30 using FIFO, LIFO, and average-cost. (Round the average unit cost to 3 decimal places, e.g. 123.234 and final answers to 0 decimal places, e.g. 125.)