Solve for the missing amounts for the following separate cases.

$\backslash$table$[[$Case$,\backslash$table$[[$Sales price$],[$per unit$]],\backslash$table$[[$Variable costs$],[$per unit$]],\backslash$table$[[$Contribution$],[$margin per unit$]],\backslash$table$[[$Contribution$],[$margin ratio$]]],[1,$$$,24,,-],[2,,30,10,],[3,,,59,20\%$