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 $200$ units @ $$90$ per unit

March $5$ Purchase $500$ units @ $$95$ per unit

March $9$ Sales $520$ units @ $$125$ per unit

March $18$ Purchase $320$ units @ $$100$ per unit

March $25$ Purchase $400$ units @ $$102$ per unit

March $29$ Sales $360$ units @ $$135$ per unit

Totals $1,420$ units $880$ units

For specific identification, units sold include $70$ units from beginning inventory, $450$ units from the March $5$ purchase, $140$ units from the March $18$ purchase, and $220$ units from the March $25$ purchase.

Problem $5-2$AA $($Algo$)$ Part $4$

$4.$ Compute gross profit earned by the company for each of the four costing methods.

Note: Round your average cost per unit to $2$ decimal places and final answers to nearest whole dollar.