Exercise 5-13 Changes in Selling Price, Sales Volume, Variable Cost per Unit, and Total Fixed Costs (LO5-1, LO5-4) 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 $ 320,000 200,000 120,000 44,000 $ 76,000 Per Unit $ 8.00 5.00 $ 3.00 Required: (Consider each case independently): 1. What is the revised net operating income if unit sales increase by 15%? 2. What is the revised net operating income if the selling price decreases by $1.20 per unit and the number of units sold increases by 20%? 3. What is the revised net operating income if the selling price increases by $1.20 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 10%, variable expenses increase by 40 cents per unit, and the number of units sold decreases by 10%? 1. Net operating income 2. Net operating income 3. Net operating income 4. Net operating income