Whirly Corporation's contribution format income statement for the most recent month is shown below Sales (8,700 units) Variable expenses Contribution margin Fixed expenses Net operating income Total $ 261,000 165,300 95,700 55,600 $ 40,100 Per Unit $ 30.00 19.00 $ 12.00 Required: Consider each case independently) 1. What would be the revised net operating income per month if the sales volume increases by 80 units? 2. What would be the revised net operating income per month if the sales volume decreases by 80 units? 3. What would be the revised net operating income per month if the sales volume is 7700 units? 1. Revised net operating income 2 Revised not operating income 3. Revised not operating income $ $ 42,670 41.130 30.900 $