Answer:
C. 31.25%.
Explanation:
PRODUCTS X Y Z Total
Sales in dollars $20,000 $40,000 $100,000 $160,000
CM ratio 45% 40% 25%
Contribution margin ratio can be calculated by weighted average method base on the sales ratio of each product.
Contribution margin as a whole = ( CM ratio of X x Ratio of X in total sales ) + ( CM ratio of Y x Ratio of Y in total sales ) + ( CM ratio of Z x Ratio of Z in total sales )
Contribution margin as a whole = ( 45% x $20,000 / $160,000 ) + ( 40% x $40,000 / $160,000 ) + ( 25% x $100,000 / $160,000 )
Contribution margin as a whole = 5.625% + 10% + 15.625% = 31.25%
