Miller Company's contribution format income statement for the most recent month is shown below: Total Per Unit Sales (42,000 units) $ 210,000 $5.00 Variable expenses 84,000 2.00 Contribution margin 126,000 $ 3.00 Fixed expenses 48,000 Net operating income $ 78,000 Required: (Consider each case independently): 1. What is the revised net operating income if unit sales increase by 18%? 2. What is the revised net operating income if the selling price decreases by $1.50 per unit and the number of units sold increases by 19%? 3. What is the revised net operating income if the selling price increases by $1.50 per unit, fixed expenses increase by $6,000, and the number of units sold decreases by 8%? 4. What is the revised net operating income if the selling price per unit increases by 10%, variable expenses increase by 20 cents per unit, and the number of units sold decreases by 8%? 1. Net operating income 2. Not operating income 3. Not operating income 4. Not operating income