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$]]],[1,25,$$$20,,],[2,,30,10,],[3,,F,60,20\%$