Muy Bueno Bakery sells three different products. Currently they are not able to meet all of their customers' demand. Using the following information, determine the price of the cake needed to meet the same contribution margin as the pie.

Cake

Pie

Cookies

Contribution margin

$$18$

$$11$

$$3$

Production hours

$3$

$1$

$\mathrm{.}30$

Variable cost

$$12$

$$7$

$$1$

Contribution margin$/$hour

$$6$

$$11$

$$10$

Current selling price

$$30$

$$18$

$$5$

a$.$ $$30$

b$.$ $$42$

c$.$ $$45$

d$.$ $$36$