4 Whirly Corporation's contribution format Income statement for the most recent month is shown below Sales (8,700 units) Variable expenses Contribution margin Fixed expenses Net operating income 1 points Total 5 295,800 156,600 139,200 54,500 $ 84,400 Per Unit $ 34.ee 18.ee $ 16.00 WOO non D Required: Consider each case Independently 1 What would be the revised net operating income per month if the sales volume increases by 60 units? 2. What would be the revised net operating income per month if the sales volume decreases by 60 units? 3. What would be the revised net operating income per month if the sales volume is 7700 units? Revised not operating incomo 2 Revised not operating income 3. Revised net operating income