Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (8,800 units) Contribution margin Variable expenses Fixed expenses Net operating income Required: (Consider each case independently): Total $ 299,200 167,200 132,000 55,100 $ 76,900 Per Unit $ 34.00 19.00 $ 15.00 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 7,800 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income