Required information [The following information applies to the questions displayed below.] Warnerwoods Company uses a periodic inventory system. It entered into the following purchases and sales transactions for March. Date Activities March 1 March 5 Beginning inventory Purchase March 9 Sales March 18 March 25 March 29 Purchase Purchase Sales Units Acquired at Cost 105 units $40 per unit 405 units $45 per unit 130 units @$50 per unit 210 units @ $52 per unit Units Sold at Retail 425 units @ $75 per unit Totals 850 units 170 units @ $85 per unit 595 units For specific identification, units sold include 70 units from beginning inventory, 355 units from the March 5 purchase, 45 units from the March 18 purchase, and 125 units from the March 25 purchase. 4. Compute gross profit earned by the company for each of the four costing methods. (Round your average cost per unit to 2 decimal places and final answers to nearest whole dollar.) Sales Less: Cost of goods sold Gross profit FIFO LIFO Weighted Average Specific Identification