Exercise 5-1 The Effect of Changes in Activity on Net Operating Income (LO5-1) 6 Whirly Corporation's contribution format income statement for the most recent month is shown below: Sales (7,800 units) Variable expenses Contribution margin Fixed expenses Net operating income Total $ 257,400 148,200 109,200 55,200 $ 54,000 Por Unit $ 33.00 19.00 $ 14.00 Required: (Consider each case independently): 1. What would be the revised net operating Income per month if the sales volume Increases by 50 units? 2. What would be the revised net operating Income per month if the sales volume decreases by 50 units? 3. What would be the revised net operating income per month if the sales volume is 6,800 units? 1. Revised not operating income 2. Revised net operating income 3. Revised net operating income