Exercise 6-1 The Effect of Changes in Activity on Net Operating Income [LO6-1] Whirly Corporation's contribution format Income statement for the most recent month is shown below. Sales (8,700 units) Variable expenses Contribution margin Fixed expenses Net operating income Total $ 269,700 156,6ee 113, 10e 55,300 $ 57,see Per Unit $ 31.00 18.00 $ 13.00 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 of 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