Contribution margin

Willie Company sells $38,000$ units at $$25$ per unit. Variable costs are $$18\mathrm{.}75$ per unit, and fixed costs are $$114,000.$

Determine $($a$)$ the contribution margin ratio, $($b$)$ the unit contribution margin, and $($c$)$ operating income.

a$.$ Contribution margin ratio $($Enter as a whole number.$)\%$

b$.$ Unit contribution margin $($Round to the nearest cent.$)$ per, unit

c$.$ Operating income