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 Activities March 5 Beginning inventory Purchase March 9 Sales March 18 March 25 March 29 Purchase Purchase Sales 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 Units Sold at Retail 300 units @ $86.80 per unit Totals 680 units 170 units a $96.80 per unit 470 units 4. Compute gross profit earned by the company for each of the four costing methods. For specific identification, units sold include 85 units from beginning inventory, 215 units from the March 5 purchase, 65 units from the March 18 purchase, and 105 units from the March 25 purchase. Note: Round weighted average cost per unit to two decimals and final answers to nearest whole dollar. Gross Margin FIFO LIFO Weighted Average Specific ID Sales Less: Cost of goods sold Gross profit