Sage Hill inc. sells a snowboard, Ezslide, that is popular with snowboard enthusiasts. Below is information relating to Sage Hill Inc's purchases of EZslide snowboards during September. During the same month, 100 EZslide snowboards were sold. Sage Hill inc. uses a periodicinventory system. (a) Compute the ending inventory at September 30 using the FIFO, LIFO and average-cost methods, (Round averoge cost per unit to 3 decimal ploces, e.g. 125.153 and final answers to 0 decimal places, e.8. 125.) (a) Compute the ending inventory at September 30 using the FIFO, LIFO and average-cost methods. (Round average cost per unit to 3 decimal places, e.8. 125.153 and final answers to 0 decimal places, e.3. 125.) (b) Compute the cost of goods sold at September 30 using the FIFO, LIFO and average-cost methods. (Round average cost per unit to 3 decimal places, e.g. 125.153 and final answers to 0 decimal places, e.g. 125.)