Whirly Corporations contribution format income statement for the most recent month is shown below: Total Per Unit Sales (7,200 units) $ 230,400 $ 32.00 Variable expenses 144,000 20.00 Contribution margin 86,400 $ 12.00 Fixed expenses 54,200 Net operating income $ 32,200 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 6,200 units?