Whirly Corporation's contribution format income statement for the most recent month is shown below: Total Sales (7,300 units) Variable expenses Contribution margin $ 226,300 131,400 94,900 54,200 Per Unit $ 31.00 18.00 $ 13.00 Fixed expenses Net operating income Required: (Consider each case independently): $ 40,700 1. What would be the revised net operating income per month if 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 6,300 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income