Teal Mountain sells a snowboard, EZslide, that is popular with snowboard enthusiasts. Below is information relating to Teal Mountain's purchases of EZslide snowboards during September. During the same month, 105 EZslide snowboards were sold. Teal Mountain uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 15 $98 $1,470 12 Purchase 45 100 4,500 19 Purchase 50 102 5,100 26 Purchase 20 103 2,060 Total 130 $13,130 Compute the ending inventory at September 30 using the FIFO, LIFO and average-cost methods. Ending inventory at September 30 $ +A FIFO LA $ LIFO AVERAGE-COST +A $