Wamerwoods Company uses a perpetual inventory system. It entered into the following purchases and sales transactions for March. Problem 5-1A (Algo) Part 4 4. Compute gross profit earned by the company for each of the four costing methods. For specific identification, units sold include 90 units from beginning inventory, 220 units from the March 5 purchase, 70 units from the March 18 purchase, and 110 units from the March 25 purchase. Note: Round weighted average cost per unit to two decimals and final answers to nearest whole dollar