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: Sales (8,300 units) Variable expenses Contribution margin Fixed expenses Net operating income Required: (Consider each case independently): Total $ 257,300 149,400 Per Unit $ 31.00 18.00 107,900 $ 13.00 55,100 $ 52,800 1. What would be the revised net operating income per month if the sales volume increases by 40 units? 2. What would be the revised net operating income per month if the sales volume decreases by 40 units? 3. What would be the revised net operating income per month if the sales volume is 7,300 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income