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 Units Sold at Retail March 1 March 5 Activities Beginning inventory Purchase Sales Purchase. Units Acquired at Cost 190 units @ $52.80 per unit 270 units @ $57.80 per unit March 9 350 units @ $87.80 per unit March 18 March 25 Purchase Sales 130 units @ $62.80 per unit 240 units $64.80 per unit March 29 220 units @ $97.80 per unit 570 units Totals 830 units 4. Compute gross profit earned by the company for each of the four costing methods. For specific identification, units sold include 110 units from beginning inventory, 240 units from the March 5 purchase, 90 units from the March 18 purchase, and 130 units from the March 25 purchase. (Round weighted average cost per unit to two decimals and final answers to nearest whole dollar.) Weighted Gross Margin FIFO LIFO Average +Specific ID Sales Less: Cost of goods sold Gross profit