Whirly Corporation's contribution format income statement for the most recent month is shown below: TotalPer Unit 287,10e 33.06e Sales (8,780 units) Variable expenses Contribution margin Fixed expenses Net operating income 100 174,00020,60 113,100 13.00 54,200 $58,9ee Required: (Consider each case independently): would be the revised net operating income per month if the sales volume increases by 80 units? 1. What 2. What would be the revised net operating income per month if the sales volume decreases by 80 units? 3. What would be the revised net operating income per month if the sales volume is 7700 units