Warnerwoods Company uses a perpetual 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 $210$ units @ $$53\mathrm{.}20$ per unit

March $5$ Purchase $280$ units @ $$58\mathrm{.}20$ per unit

March $9$ Sales $370$ units @ $$88\mathrm{.}20$ per unit

March $18$ Purchase $140$ units @ $$63\mathrm{.}20$ per unit

March $25$ Purchase $260$ units @ $$65\mathrm{.}20$ per unit

March $29$ Sales $240$ units @ $$98\mathrm{.}20$ per unit

Totals $890$ units $610$ units

Compute the cost assigned to ending inventory using $($a$)$ FIFO, $($b$)$ LIFO, $($c$)$ weighted average, and $($d$)$ specific identification. For specific identification, units sold include $120$ units from beginning inventory, $250$ units from the March $5$ purchase, $100$ units from the March $18$ purchase, and $140$ units from the March $25$ purchase.

$4.$ Compute gross profit earned by the company for each of the four costing methods. For specific identification, units sold include $120$ units from beginning inventory, $250$ units from the March $5$ purchase, $100$ units from the March $18$ purchase, and $140$ units from the March $25$ purchase.