Sheffield Corp. sells a snowboard, EZslide, that is popular with snowboard enthusiasts. Below is information relating to Sheffield Corps purchases of Ezslide snowboards during September. During the same month, 100 EZslide snowboards were sold. Sheffield Corp. uses a periodic inventory system. Date Units 10 Sept. 1 Sept. 12 Sept. 19 Sept. 26 Explanation Inventory Purchases Purchases Purchases Totals Unit Cost $100 103 45 Total Cost $1,000 4,635 5.200 2.100 $12.935 50 20 104 105 125 (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, eg. 125.153 and final answers to decimal places, eg. 125.) FIFO LIFO The ending inventory at September 30 AVERAGE-COST $ (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, eg 125.153 and final answers to decimal places, eg. 125.) FIFO LIFO AVERAGE-COST The ending inventory at September 30 $ $ 1 (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. eg. 125.153 and final answers to decimal places, eg. 125.) FIFO LIFO AVERAGE-COST Cost of goods sold $