ve 1 Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (7,800 units) Variable expenses Total $265,200 Per Unit $ 34.00 148,200 117,000 55,100 19.00 $15.00 Contribution margin Fixed expenses Net operating income $ 61,900 Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 60 units? 2. What would be the revised net operating income per month if the sales volume decreases by 60 units? 3. What would be the revised net operating income per month if the sales volume is 6,800 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income