1 Exercise 5-1 The Effect of Changes in Activity on Net Operating Income [LO5-1] Whirly Corporation's contribution format income statement for the most recent month is shown below: 30 points Per Unit $34.00 Total Sales (7,900 units) Variable expenses $268,600 142 , 200 18.00 Contribution margin $16.00 126,400 eBook Fixed expenses 55,300 $71,100 Net operating income Hint Required: (Consider each case independently): Print 1. What would be the revised net operating income per month if the sales volume increases by 50 units? 2. What would be the revised net operating income per month if the sales volume decreases by 50 units? 3. What would be the revised net operating income per month if the sales volume is 6,900 units? References Revised net operating income 1 2. Revised net operating income 3. Revised net operating income