Exercise 6-1 The Effect of Changes in Activity on Net Operating Income [LO6-1) Whirly Corporation's contribution format income statement for the most recent month is shown below: Total 225,000 150,000 75,000 55, 600 19,400 Per Unit 30.00 20.00 $10.00 Sales (7,500 units) Variable expenses Contribution margin Fixed expenses Net operating income Required (Consider each case independently) 1. What would be the revised net operating income per month if the sales volume increases by 100 units? 2. What would be the revised net operating income per month if the sales volume decreases by 100 units? 3. What would be the revised net operating income per month if the sales volume is 6,500 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income