Exercise 6-1 (Algo) The Effect of Changes in Sales Volume on Net Operating Income [LO6-1] Whirly Corporation's contribution format income statement for the most recent month is shown below. ed Sales (8,900 units) Variable expenses Contribution margin Fixed expenses Net operating income nces Required: Total Per Unit $ 284,800 178,000 106,800 56,000 $ 50,800 $ 32.00 20.00 $12.00 (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 90 units? 2. What would be the revised net operating income per month if the sales volume decreases by 90 units? 3. What would be the revised net operating income per month if the sales volume is 7,900 units?