Blue Spruce Corp. sells a snowboard, EZslide, that is popular with snowboard enthusiasts. Below is information relating to Blue Spruce Corp.'s purchases of EZslide snowboards during September. During the same month, 108 EZslide snowboards were sold. Blue Spruce Corp. uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 11 $116 $1,276 Sept. 12 Purchases 48 119 5,712 Sept. 19 Purchases. 60 120 7,200 Sept. 26 Purchases Totals 21 121 2,541 140 $16,729 (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.g. 125.153 and final answers to O decimal places, e.g. 125.) nding inventory at ember 30 FIFO LIFO AVERAGE-COST (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 O decimal places, e.g. 125.) FIFO Cost of goods sold $ LIFO $ AVERAGE-COST $