Splish Brothers sells a snowboard, EZslide, that is popular with snowboard enthusiasts. Below is information relating to Splish Brothers's purchases of EZslide snowboards during September. During the same month, 105 EZslide snowboards were sold, Splish Brothers uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 15 $116 $1,740 12 Purchase 45 118 5,310 19 Purchase 50 120 6,000 26 Purchase 20 121 2.420 Total 130 $15,470 Compute the ending inventory at September 30 using the FIFO, LIFO and average-cost methods. FIFO LIFO AVERAGE-COST Ending inventory at September 30 $ Compute the ending inventory at September 30 using the FIFO, LIFO and average-cost methods. FIFO LIFO AVERA Ending inventory at September 30 $ $ $ Compute the cost of goods sold at September 30 using the FIFO, LIFO and average-cost methods. FIFO LIFO AVERAGE-COST Cost of goods sold $ $