2 Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (8,100 units) Variable expenses Contribution margin Fixed expenses Net operating income 6 points Total $ 267,300 153,900 113,400 54,700 $ 58,700 Per Unit $ 33.00 19.00 $ 14.00 eBook Required: (Consider each case independently): References 1. What would be the revised net operating income per month if the sales volume increases by 90 units? 2. What would be the revised net operating income per month if the sales volume decreases by 90 units? 3. What would be the revised net operating income per month if the sales volume is 7100 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income