Whirly Corporation's contribution format income statement for the most recent month is shown below. Sales (8,000 units) Variable expenses Contribution margin Fixed expenses Net operating income Required: (Consider each case independently): Total $ 272,000 152,000 120,000 Per Unit $ 34.00 19.00 $ 15.00 54,700 $ 65,300 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 7,000 units? 1. Revised net operating income 2. Revised net operating income. 3. Revised net operating income)