Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (7,600 units) Contribution margin Variable expenses Fixed expenses Net operating income Required: Total $ 250,800 144,400 Per Unit $ 33.00 19.00 106,400 $ 14.00 55,400 $51,000 ces (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 40 units? 2. What would be the revised net operating income per month if the sales volume decreases by 40 units? 3. What would be the revised net operating income per month if the sales volume is 6,600 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income +