Whirly Corporation's contribution format income statement for the most recent month is shown below Total $244,900 150,100 Per Unit Sales (7,900 units) Variable expenses $ 31.00 19.00 Contribution margin $12.00 94,800 Fixed expenses 55,200 $ 39,600 Net operating income Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 60 units? 2. What would be the revised net operating income per month if the sales volume decreases by 60 units? 3. What would be the revised net operating income per month if the sales volume is 6,900 units? 1 Revised net operating income 2 Revised net operating income 3. Revised net operating income