Exercise 6-13 Changes in Selling Price, Sales Volume, Variable Cost per Unit, and Total Fixed Costs [LO6-1, LO6-4] Miller Company's contribution format income statement for the most recent month is shown below: Sales (36,000 units) Variable expenses Contribution margin Fixed expenses Net operating income Total $ 180,000 72,000 108,000 44,000 $ 64,000 Per Unit $ 5.00 2.00 $ 3.00 Required: (Consider each case independently): 1. What is the revised net operating income if unit sales increase by 19%? 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 24%? 3. What is the revised net operating income if the selling price increases by $1.20 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 20%, variable expenses increase by 30 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