Whirly Corporation's contribution format income statement for the most recent month is shown below: Total Per Unit Sales (8, 200 units) $ 262, 400 $ 32.00 Variable expenses 155 , 800 19 .00 Contribution margin 106, 600 $ 13.00 Fixed expenses 54 , 900 Net operating income $ 51, 700 Required: ices (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 80 units? 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 7,200 units? 1 . Revised net operating income 2. Revised net operating income 3. Revised net operating income