Engberg Company installs lawn sod in home yards. The companys most recent monthly contribution format income statement follows:

	Amount	Percent of Sales
Sales	$ 147,000	100%
Variable expenses	58,800	40%
Contribution margin	88,200	60%
Fixed expenses	21,000
Net operating income	$ 67,200

Required:

1. What is the companys degree of operating leverage?

2. Using the degree of operating leverage, estimate the impact on net operating income of a 21% increase in unit sales.

3. Construct a new contribution format income statement for the company assuming a 21% increase in unit sales.