Exercise 5-1 (Algo) The Effect of Changes in Sales Volume on Net Operating Income [LO5-1] Whirly Corporation's contribution format income statement for the most recent month is shown below: Variable expenses Sales (8,400 units) Contribution margin Fixed expenses Net operating income Required: (Consider each case independently): Total $ 285,600 159,600 126,000 Per Unit $ 34.00 19.00 $ 15.00 55,000 $ 71,000 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 7,400 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income