PLS HELP ! Compute gross profit earned by the company for each of the four costing methods. For specific identification, the March 9 sale consisted of 95 units from beginning inventory and 225 units from the March 5 purchase; the March 29 sale consisted of 75 units from the March 18 purchase and 115 units from the March 25 purchase. (Round weighted average cost per unit to two decimals and final answers to nearest whole dollar.)