1. We can recast Marston’s income statement to emphasize contribution margin, and then use it
to compute the required CVP parameters.
For the Year Ended December 31, 2011
Cost of goods sold—variable
Contribution margin percentage
($9,620,000
Breakeven revenues
($6,290,000
Degree of operating leverage
($9,620,000
2. The calculations indicate that at sales of $26,000,000, a percentage change in sales and
contribution margin will result in 2.89 times that percentage change in operating income if
Marston continues to use sales agents and 3.51 times that percentage change in operating income
3. Variable costs of marketing = 15% of Revenues
Fixed marketing costs = $5,500,000