Whirly's contribution format income statement for the most recent month is shown below: Sales (11,100 units) Variable expenses Contribution margin Fixed expenses Operating income Total $444,000 166,500 277,500 252.500 $ 25,000 Per Unit $40.00 15.00 $25.00 Required: Consider each case Independently. You need not prepare a new income statement. Instead, use the incremental approach where possible 1. What would be the revised operating income per month if the sales volume increases by 100 units? 2. What would be the revised operating income per month if the sales volume decreases by 190 units? 3. What would be the revised operating income per month if the sales volume is 10,100 units? 1 Revised operating income 2 Revised operating incomo 3 Revised operating income