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 Units Sold at Retail Units Acquired at Cost 60 units @ $50.20 per unit 205 units @ $55.20 per unit 220 units @ $85.20 per unit Date Activities Mar. 1 Beginning inventory Mar. 5 Purchase Mar. 9 Sales Mar. 18 Purchase Mar. 25 Purchase Mar. 29 Sales Totals 65 units @ $60.20 per unit 110 units @ $62.20 per unit 90 units @ $95.20 per unit 310 units 440 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 45 units from beginning inventory and 175 units from the March 5 purchase; the March 29 sale consisted of 25 units from the March 18 purchase and 65 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 L IFO Weighted Average Specific Identification Sales Less: Cost of goods sold Gross profit