Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (7,900 units) Contribution margin Variable expenses Fixed expenses Net operating income Required: (Consider each case independently): Total $ 244,900 142,200 102,700 Per Unit $ 31.00 18.00 $ 13.00 54,700 $ 48,000 1. What would be the revised net operating income per month if the sales volume increases by 70 units? 2. What would be the revised net operating income per month if the sales volume decreases by 70 units? 3. What would be the revised net operating income per month if the sales volume is 6,900 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income