1 Check my work Whirly Corporation's contribution format income statement for the most recent month is shown below: 7 points Sales (8,700 units) Variable expenses Contribution margin Total $ 269,700 156,600 Per Unit $ 31.00 18.00 113,100 $ 13.00 eBook Fixed expenses 54,600 Net operating income $ 58,500 Hint Required: Print References (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 7,700 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income