Compute the cost assigned to ending inventory using $($a$)$ FIFO, $($b$)$ LIFO, $(c)$ weighted average, and $(d)$ specific identification. For specific identification, units sold consist of $675$ units from beginning inventory, $375$ from the February $10$ purchase, $275$ from the March $13$ purchase, $125$ from the August $21$ purchase, and $400$ from the September $5$ purchase.

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

$\backslash$table$[[,$Ending Inventory$],[($a$)$ FIFO,$],[($b$)$ LIFO,$],[($c$)$ Weighted average,$],[($d$)$ Specific identification,$]]$

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. Round your final answers to the nearest whole dollar amount.

$\backslash$table$[[,$FIFO,LIFO,$\backslash$table$[[$Weighted$],[$Average$]],\backslash$table$[[$Specific$],[$Identification$]]],[$Sales$,,,,],[$Less: Cost of goods sold,,,,$],[$Gross profit,$$,$$$,$$$,$$