Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (7,200 units) Variable expenses Contribution margin Fixed expenses Net operating income Total $244,800 Per Unit 144,000 100,800 $ 34.00 20.00 $ 14.00 54,700 $ 46,100 Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 60 units? 2. What would be the revised net operating income per month if the sales volume decreases by 60 units? 3. What would be the revised net operating income per month if the sales volume is 6,200 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income