Whirly Corporation's contribution format income statement for the most recent month is shown below: Per Unit Sales (8,300 units) Variable expenses Contribution margin Fixed expenses Net operating income Required: Total $ 265,600 157,700 107,900 $ 32.00 19.00 $ 13.00 54,500 $ 53,400 (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 7,300 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income