4. Compute gross profit earned by the company for each of the four costing methods. For specific identification, units sold include 115 units from beginning inventory, 245 units from the March 5 purchase, 95 units from the March 18 purchase, and 135 units from the March 25 purchase. Note: Round weighted average cost per unit to two decimals and final answers to nearest whole dollar. 4. Compute gross profit earned by the company for each of the four costing methods. For specific identification, units sold include 115 units from beginning inventory, 245 units from the March 5 purchase, 95 units from the March 18 purchase, and 135 units from the March 25 purchase. Note: Round weighted average cost per unit to two decimals and final answers to nearest whole dollar