25 Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (7,000 units) Variable expenses Total $ 238,000 133,000 Contribution margin Fixed expenses 105,000 54,100 Per Unit $ 34.00 19.00 $ 15.00 Net operating income $ 50,900 Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 100 units? 2. What would be the revised net operating income per month if the sales volume decreases by 100 units? 3. What would be the revised net operating income per month if the sales volume is 6,000 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income