Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (8,500 units) Variable expenses Contribution margin Total $ 280,500 161,500 119,000 55,800 Per Unit $ 33.00 19.00 $ 14.00 Net operating income $ 63,200 Fixed expenses 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 7,500 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income