Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (7,700 units) T $ Variable expenses Contribution margin Fixed expenses 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 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 6,700 units? ribution for the wn below: Total Per Unit $ 261,800 $ 34.00 154,000 20.00 107,800 $ 14.00 54,800 $ 53,000 pendently): sed net nth if the y 70 units? sed net nth if the