$\backslash$table$[[\backslash$table$[[$Quantity of$],[$Labor$]],\backslash$table$[[$Total$],[$Product$]],\backslash$table$[[$Average$],[$Product$]],\backslash$table$[[$Marginal$],[$Product$]]],[1,,320,],[2,335,,],[3,,,338],[4,,,320]]$

Refer to the above table. What does total product equal when $2$ units of labor are used?

$320$

$335$

$350$

$670$