Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (8,800 units) Variable expenses Contribution margirn Fixed expenses Net operating income 5 299,200 167,200 34.00 19.00 132,e08 15.08 54,700 s 77,3ee Book Hint Pint Required: Consider each case independently): ferences 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 7800 units? 1. Revised net operating income 2 Revised net operating income 3. Revised net operating income