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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 12 nits from beginning inventory, 250 units from the March 5 purchase, 100 units from the March 18 purchase, and 140 units from the larch 25 purchase. (Round weighted average cost per unit to two decimals and final answers to nearest whole dollar.)