The contribution margin ratio is

a$.$ the same as the variable cost ratio

b$.$ the same as profit

c$.$ the portion of equity contributed by the stockholders

d$.$ the same as the profit$-$volume ratio

Zeke Company sells $25,000$ units at $$21$ per unit. Variable costs are $$10$ per unit, and fixed costs are $$75,000.$ The contribution margin ratio and the unit contribution margin are

a$.47\%$ and $$11$ per unit

b$.53\%$ and $$7$ per unit

c$.47\%$ and $$8$ per unit

d$.52\%$ and $$11$ per unit