Required information [The following information applies to the questions displayed belowj Warnerwoods Company uses a perpetual inventory system. It entered into the following purchases and sales transactions for March. Activities Units Acquired at Cost 120 units $51.40 per unit 235 units $56.40 per unit Units Sold at Retail Date Mar. 1 Beginning inventory Mar. 5 Purchase Mar. 9 Sales Mar. 18 Purchase Mar. 25 Purchase Mar. 29 Sales 280 units $86.40 per unit 95 units$61.40 per unit 170 units $63.40 per unit 150 units$96.40 per unit 430 units Totals 620 units 4. Compute gross profit earned by the company for each of the four costing methods. For specific identification, the March 9 sale consisted of 75 units from beginning inventory and 205 units from the March 5 purchase; the March 29 sale consisted of 55 units from the March 18 purchase and 95 units from the March 25 purchase. (Round weighted average cost per unit to two decimals and final answers to nearest whole dollar.)