Whirly Corporation's contribution format income statement for the most recent month is shown below: Per Unit Total $ 236,800 148,000 $ 32.00 Sales (7,400 units) Variable expenses 20.00 Contribution margin $12.00 88,800 Fixed expenses 54,800 $34,000 Net operating income 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 if the sales volume decreases by 50 units? 3. What would be the revised net operating income per month if the sales volume is 6,400 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income