$[$The following information applies to the questions displayed below.$]$

Warnerwoods Company uses a perpetual inventory system. It entered into the following purchases and sales transactions for March.

$4.$ Compute gross profit earned by the company for each of the four costing methods. For specific identification, units sold include $80$ units from beginning inventory, $210$ units from the March $5$ purchase, $60$ units from the March $18$ purchase, and $100$ units from the March $25$ purchase.

Note: Round weighted average cost per unit to two decimals and final answers to nearest whole dollar.

Answer is complete but not entirely correct.

$\backslash$table$[[$Gross Margin,,FIFO,,LIFO,,$\backslash$table$[[$ighted$],[$erage$]],$Specific ID$],[$Sales$,$$$,20,770,$$$,20,770,$$$,20,770,20,770],[\backslash$table$[[$Less: Cost of goods$],[$sold$]],,16,350,,15,860,,20,420,28,600$