Compute gross profit earned by the company for each of the four costing methods. For specific identification, the March 9 sale consisted of 65 units from beginning inventory and 195 units from the March 5 purchase; the March 29 sale consisted of 45 units from the March 18 purchase and 85 units from the March 25 purchase. (Round weighted average cost per unit to two decimals.) Compute gross profit earned by the company for each of the four costing methods. For specific identification, the March 9 sale consisted of 65 units from beginning inventory and 195 units from the March 5 purchase; the March 29 sale consisted of 45 units from the March 18 purchase and 85 units from the March 25 purchase. (Round weighted average cost per unit to two decimals.)