Total $ 275,400 153,900 121,500 55,200 $ 66,300 Per Unit $ 34.00 19.00 $ 15.00 Sales (8,100 units) Variable expenses Contribution margin Fixed expenses Net operating income Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 80 units? 2. What would be the revised net operating income per month if the sales volume decreases by 80 units? 3. What would be the revised net operating Income per month if the sales volume is 7100 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income