Mather sells a snowboard, ezslide, that is popular with snowboard enthusiasts. below is information relating to mather’s purchases of ezslide snowboards during september. during the same month, 102 ezslide snowboards were sold. mather uses a periodic inventory system. date explanation units unit cost total cost sept. 1 inventory 12 $100 $ 1,200 sept. 12 purchases 45 103 4,635 sept. 19 purchases 50 104 5,200 sept. 26 purchases 20 105 2,100 totals 127 $13,135 (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 0 decimal places, e. g. 125.) fifo lifo average-cost the ending inventory at september 30 $enter a dollar amount 13135 $enter a dollar amount 13135 $enter a dollar amount 103.425 (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.) fifo lifo average-cost cost of goods sold $enter a dollar amount 0 $enter a dollar amount 0 $enter a dollar amount 103.425