please answer and explain how to do this thank you!

Question 4 --/1 View Policies Current Attempt in Progress Teal Mountain Inc. sells a snowboard, EZslide, that is popular with snowboard enthusiasts. Below is information relating to Teal Mountain Inc's purchases of EZslide snowboards during September. During the same month, 102 EZslide snowboards were sold. Teal Mountain Inc. uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory $ 1,391 $107 110 Sept. 12 Purchases 5,390 Sept. 19 Purchases 5,883 Sept. 26 Purchases 2,240 Totals $14.904 (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 (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 decimal places, e.g. 125.) FIFO LIFO AVERAGE-COST Cost of goods sold e Textbook and Media