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 March 1 March 5 March 9 Activities Beginning inventory Purchase Units Acquired at Cost 170 units @ $52.40 per unit 260 units @$57.40 per unit Units Sold at Retail March 18 March 25 March 29 Sales Purchase Purchase Sales Totals 330 units @$87,40 per unit. 120 units @ $62.40 per unit 220 units @ $64.40 per unit 770 units 200 units @ $97.40 per unit 530 units 4. Compute gross profit earned by the company for each of the four costing methods. For specific identification, units sold include 100 units from beginning inventory, 230 units from the March 5 purchase, 80 units from the March 18 purchase, and 120 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 Weighted Average Specific ID