Whirly Corporation's contribution format income statement for the most recent month is shown below: Total Per Unit Sales (8,700 units) $ 269, 700 $ 31.00 Variable expenses 165,300 19.00 Contribution margin 104,400 $ 12.00 Fixed expenses 55, 200 Net operating income $ 49,200 Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 30 units? 2. What would be the revised net operating income per month if the sales volume decreases by 30 units? 3. What would be the revised net operating income per month if the sales volume is 7,700 units? 1 Revised net operating income $ 40,818 2 Revised net operating income 3 Revised net operating income