Answer:
Contribution Margin Ratio = 0.33
Step-by-step explanation:
Our first goal:
Calculate the Contribution margin:

Sales 50,000 * 5$ = 250,000
Variable Expenses
Materials 50,000 (1-10%) = 45,000
Labor 90,000 (1-20%) = 72,000
Overhead 40,000 (1-30%) = 28,000
M&Admin 20,000 (1-50%) = 10,000
Sales Commision 250,000 5% =12,500
Total Variable Cost = 167,500
Contribution Margin 250,000-167,500 = 82,500
Notice in your table you have the percent of fixed cost per line, so the rest is variable cost.
Now we calculate the CM ratio
