help please!

REl 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. Compute the ending inventory at September 30 using FIFO. LIFO, and average-cost. (Round average cost per unit to 3 decimal places, es. 125.153 and final answers to 0 decimal ploces, eg. 125.) Compute the ending inventory at September 30 using HIFO, LiFO, and average-cost. (Round overage cost per unit to 3 decimal places, es. 125.153 and final onswers to 0 decimal places, eg. 125.) Compute the cost of goods sold for the month using the FIFO, LIFO, and average-cost methods. (Round average cost per unit to 3 . decimal places, es. 125.153 and final answers to 0 decimal places, es. 125.)