Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (7,100 units) Variable expenses Contribution margin Fixed expenses Net operating income Required: Total $ 241,400 134,900 106,500 55,200 Per Unit $ 34.00 19.00 $ 15.00 (Consider each case independently): $ 51,300 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 6,100 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income