Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (7,600 units) Variable expenses Total $ 250,800 136,800 Contribution margin Fixed expenses Net operating income $ 114,000 54,300 59,700 Per Unit $ 33.00 18.00 $ 15.00 Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 30 units? 2. What would be the revised net operating income per month if the sales volume decreases by 30 units? 3. What would be the revised net operating income per month if the sales volume is 6,600 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income