Whirly Corporation's contribution format income statement for the most recent month is shown below. Sales (9,808 units) Variable expenses Contribution margin Fixed expenses Net operating income Total $ 279,800 180,000 99,800 54,600 $ 44,400 Per Unit $31.00 20.00 $ 11.00 Required: (Consider each case independentlys: 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 of the sales volume is 8.000 units? 1 Revised net operating incomo 2. Revised net operating income 3. Revised not operating incomo