[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 1 Beginning inventory Mar5 Purchase Mar. 9 Sales Mar. 18 Purchase Mar. 25 Purchase Mar. 29 Sales Activities Units Sold at Retail Units Acquired at Cost 170 units $52.40 per unit 260 units $57.40 per unit 330 units $87.40 per unit 120 units $62.40 per unit 220 units $64.40 per unit 200 units $97.40 per unit 530 units Totals 770 units Problem 5-1A Part 4 4. Compute gross profit earned by the company for each of the four costing methods. For specific identification, the March 9 sale consisted of 100 units from beginning inventory and 230 units from the March 5 purchase; the March 29 sale consisted of 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 Avg. Cost Spec. ID