Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (8,600 units) Variable expenses Contribution margin Pixed expenses Net operating income Total $ 292,400 163,400 129,000 56,000 $ 73,000 Per Unit $ 34.00 19.00 $ 15.00 Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 50 units? 2. What would be the revised net operating income per month of the sales volume decreases by 50 units? 3. What would be the revised net operating income per month if the sales volume is 7,600 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income