[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 Units sold at Retail Units Acquired at Cost 130 units @ $65 per unit 430 units @ $70 per unit 450 units @ $100 per unit Date Activities Mar. 1 Beginning inventory Mar. 5 Purchase Mar. 9 Sales Mar. 18 Purchase Mar. 25 Purchase Mar. 29 Sales Totals 180 units @ $75 per unit 260 units @ $77 per unit 220 units @ $110 per unit 670 units 1,000 units For specific identification, the March 9 sale consisted of 70 units from beginning inventory and 380 units from the March 5 purchase; the March 29 sale consisted of 70 units from the March 18 purchase and 150 units from the March 25 purchase. Problem 6-2AA Part 4 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.) FIFO LIFO Weighted Average Specific Identification Sales Less: Cost of goods sold Gross profit $ 0 $ 0 $ 0 $ 0