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 Mar. Activities 1 Beginning inventory Mar. 5 Purchase Mar. 9 Sales Mar. 18 Purchase Mar. 25 Purchase Mar. 29 Sales Totals Units Acquired at Cost 140 units @ $51.80 per unit 245 units @ $56.80 per unit 105 units @ $61.80 per unit 190 units @ $63.80 per unit 680 units Units Sold at Retail 300 units @ $86.80 per unit 170 units @ $96.80 per unit. 470 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 85 units from beginning inventory and 215 units from the March 5 purchase; the March 29 sale consisted of 65 units from the March 18 purchase and 105 units from the March 25 purchase. (Round weighted average cost per unit to two decimals and final answers to nearest whole dollar.) Gross Margin Sales Less: Cost of goods sold Gross profit FIFO LIFO Avg. Cost Spec. ID