Whirly Corporation's contribution format income statement for the most recent month is shown below Sales (8,500 units) Variable expenses Contribution margin Fixed expenses Net operating income Total Per Unit 170,000 85,00010.00 56,000 255,000 30.00 20.00 Book Hint Print $ 29,000 Required: Consider each case independently) 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 7,500 units? 1. Revised net operating income 2. Revised net opetating income 3. Revised net operating income