Whirly Corporation's contribution format income statement for the most recent month is shown below: Total Per' Unit ales (9,960 units) $ 386,689 $ 34.08 162399 18-99 ontr'ibution margin 144,666 $ 16.08 _5:199 I et operating income $ 88,966 I Required: (Consider each case independently): 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 8,000 units? 1. Revised net operating income 2. Revised net operating income 3. Revised net operating income