Answer:
a. The contribution margin ratio is 44% and unit contribution margin is $8. So a is the correct option
Step-by-step explanation:
The contribution margin ratio is the difference between a company's sales and variable cost that is expressed as apercentage of sales. The unit contribtuion margin is sales - variable cost (contribution margin) expressed in $ per unit.
The formula for Contribution margin (CM) ratio is:
CM ratio = (Selling Price - Variable cost) / Selling price
CM ratio = (18 - 10) / 18 = 0.4444 or 44.44% rounded off to 44%
The unit contribution margin = Selling price per unit - Variable cost per unit
Unit contribution margin = 18 - 10 = $8