Whirly corporation’s contribution format income statement for the most recent month is shown below: total per unit sales (10,000 units) $ 350,000 $ 35.00 variable expenses 200,000 20.00 contribution margin 150,000 $ 15.00 fixed expenses 135,000 net operating income $ 15,000 required: (consider each case independently): 1. what would be the revised net operating income per month if the sales volume increases by 100 units