Whirly Corporation's contribution format income statement for the most recent month is shown below: Required (if you're having trouble figuring out how to approach this problem, see below for a hint): (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 60 units? 2. What would be the revised net operating income per month if the sales volume decreases by 60 units? 3. What would be the revised net operating income per month if the sales volume is 7,100 units? Hint: Remember that changes in sales volume change the contribution margin, but not the fixed costs. So for each of these questions, you need to figure out how to make the appropriate adjustment to the contribution margin and then subtract the fixed costs from the new contribution margin to get the new income