1. What is meant by a products contribution margin ratio? How is this ratio useful in planning business operations?
2. In all respects, Company A and Company B are identical except that Company As costs are mostly variable; whereas, Company Bs costs are mostly fixed. When sales increase, which company will tend to realize the greatest increase in profits? Explain.
3. What is meant by the term break-even point?
4. In response to a request from your immediate supervisor, you have prepared a CVP graph portraying the cost and revenue characteristics of your companys product and operations. Explain how the lines on the graph and the break-even point would change if:
   1. The selling price per unit decreased?
   2. Fixed cost increased throughout the entire range of activity portrayed on the graph?
   3. Variable cost per unit increased?
5. What is meant by the margin of safety?
6. Explain how a shift in the sales mix could result in both a higher break-even point and a lower net income.