Miller Company's contribution format income statement for the most recent month is shown below: Sales (40,000 units) Variable expenses Contribution margin Fixed expenses Net operating income Total $ 280,000 160,000 120,000 41,000 $ 79,000 Per Unit $ 7.00 4.00 $3.00 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 $1.30 per unit and the number of units sold increases by 18%? 3. What is the revised net operating income if the selling price increases by $1.30 per unit, fixed expenses increase by $9,000, and the number of units sold decreases by 6%? 4. What is the revised net operating income if the selling price per unit increases by 20%, variable expenses increase by 40 cents per unit, and the number of units sold decreases by 12%? 1. Net operating income 2. Net operating income 3. Net operating income 4. Net operating income