Whirly Corporation's contribution format income statement for the most recent month is shown below. Sales (7,600 units) Variable expenses Fixed expenses Contribution margin: Net operating income Required: (Consider each case independently): Total $ 266,000 Per Unit 152,000 114,000 $ 35.00 20.00 $ 15.00 55,400 $ 58,600 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 6,600 units? 1. Revised net operating income $ 59,400 2. Revised net operating income $ 57,000 3. Revised net operating income $ 43,200