Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (7,500 units) Variable expenses Contribution margin Total $ 232,500 135,000 97,500 54,700 Per Unit $ 31.00 18.00 $ 13.00 Fixed expenses Net operating income Required: (Consider each case independently): $ 42,800 1. What would be the revised net operating income per month if the sales volume increases by 70 units? 2. What would be the revised net operating income per month if the sales volume decreases by 70 units? 3. What would be the revised net operating income per month if the sales volume is 6,500 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income