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 Total $ 256,000 152,000 104,000 54,700 $ 49,300 Per Unit $ 32.00 19.00 $ 13.00 ces Required: (Consider each case independently): 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 7,000 units? 1. Revised not operating income 2. Revised not operating income 3. Revised net operating income