Whirly Corporation's contribution format income statement for the most recent month is shown below: Per Unit Sales (8,200 units) Total $ 270,600 Variable expenses 155,800 Contribution margin 114,800 $ 33.00 19.00 $ 14.00 Fixed expenses Net operating income $ 55,800 59,000 Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 70 units? 2. What would be the revised net operating income per month if the sales volume decreases by 70 units? 3. What would be the revised net operating income per month if the sales volume is 7,200 units? 1. Revised net operating income: 2. Revised net operating income 3. Revised net operating income