Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (7,088 units) Variable expenses Contribution margin Fixed expenses Net operating income Total $ 210,000 133, eee 77,000 54,900 $ 22,100 Per Unit $ 3e.ee 19.00 $ 11.ee Required: (Consider each case independently) 1. What would be the revised net operating income per month of the sales volume increases by 90 units? 2. What would be the revised net operating income per month if the sales volume decreases by 90 units? 3. What would be the revised net operating income per month if the sales volume is 6,000 units? 1. Revised net operating income 2. Revised not operating income 3. Revised net operating income