Warnerwoods Company uses a periodic inventory system. It entered into the following purchases and saies transactions for March. For specific identification, units sold include 40 units from beginning inventory, 430 units from the March 5 purchase, 90 units from the March 18 purchase, and 170 units from the March 25 purchase. Compute gross profit earned by the company for each of the four costing methods. (Round your average cost per unit to 2 decimal laces and final answers to nearest whole dollar.)