Please help with LIFO FIFO

Required information [The following information applies to the questions displayed below.] Warnerwoods Company uses a perpetual inventory system. It entered into the following purchases and sales transactions for March. Date Activities Units Acquired at Cost Units Sold at Retail Mar . 1 Beginning inventory 160 units @ $52.20 per unit Mar . 5 Purchase 255 units @ $57.20 per unit Mar. 9 Sales 320 units @ $87.20 per unit Mar. 18 Purchase 115 units @ $62.20 per unit Mar. 25 Purchase 210 units @ $64.20 per unit Mar. 29 Sales 190 units @ $97.20 per unit Totals 740 units 510 units 4. Compute gross profit earned by the company for each of the four costing methods. For specific identification, the March 9 sale consisted of 95 units from beginning inventory and 225 units from the March 5 purchase; the March 29 sale consisted of 75 units from the March 18 purchase and 115 units from the March 25 purchase. (Round weighted average cost per unit to two decimals and final answers to nearest whole dollar.) Gross Margin FIFO LIFO Avg. Cost Spec. ID Sales Less: Cost of goods sold Gross profit