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. Activities Beginning inventory Purchase Date March 1 March 5 March 9 Sales March 18 Purchase March 25 Purchase March 29 Sales Totals Units Acquired at Cost 150 units @$40 per unit 450 units Units Sold at Retail $45 per unit 470 units @ $75 per unit 220 units @ $50 per unit 300 units @$52 per unit 1,120 units 260 units @$85 per unit 730 units For specific identification, units sold include 40 units from beginning inventory, 430 units from the March 5 purchase, 90 units from the March 18 purchase, and 170 units from the March 25 purchase. 4. Compute gross profit earned by the company for each of the four costing methods. Note: 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