i dont get how to find either of these. thanks for the help!

Sweet Acacia Corp. sells a snowboard, WhiteOut, that is popular with snowboard enthusiasts. Presented below is information relating to Sweet Acacia Corp's purchases of WhiteOut snowboards during September. During the same month, 147 WhiteOut snowboards were sold at $ 170 each. Sweet Acacia Corp. uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost $3,100 Sept. 1 31 $ 100 Inventory Purchases 47 Sept. 12 106 4,982 Sept. 19 Purchases 30 110 3,300 Purchases 51 112 Sept. 26 5,712 Totals 159 $ 17,094 Compute the ending Inventory at September 30 and cost of goods sold using the FIFO and LIFO methods. FIFO LIFO $ The ending inventory $ 1344 $ $ Cost of goods sold