Warnerwoods Company uses a periodic inventory system. It entered into the following purchases and sales transactions for March. Date Activities Units Acquired at Cost Units Sold at Retail

March $1$ Beginning inventory $140$ units @ $$75$ per unit

March $5$ Purchase $440$ units @ $$80$ per unit

March $9$ Sales $460$ units @ $$110$ per unit

March $18$ Purchase $200$ units @ $$85$ per unit

March $25$ Purchase $280$ units @ $$87$ per unit

March $29$ Sales $240$ units @ $$120$ per unit

Totals $1,060$ units $700$ units For specific identification, units sold include $90$ units from beginning inventory, $370$ units from the March $5$ purchase, $80$ units from the March $18$ purchase, and $160$ units from the March $25$ purchase.Compute gross profit earned by the company for each of the four costing methods.