Required information [The following information applies to the questions displayed below.] Warnerwoods Company uses a perpetual inventory system. It entered into the following purchases and sales transactions for March. - Compute gross profit earned by the company for each of the four costing methods. For specific identification, units sold include 45 nits from beginning inventory, 175 units from the March 5 purchase, 25 units from the March 18 purchase, and 65 units from the March 5 purchase. lote: Round weighted average cost per unit to two decimals and final answers to nearest whole dollar