EXERCISE 4-11 Using a Contribution Format Income Statement [LO1, L04] Miller Company's most recent contribution format income statement is shown below: Total Per Unit Sales (20,000 units) $300,000 Variable expenses 180,000 $15.00 9.00 Contribution margin 120,000 $ 6.00 Fixed expenses. 70,000 Net operating income $ 50,000 Chapter 4 Required: Prepare a new contribution format income statement under each of the following conditions (consider each case independently): 1. The number of units sold increases by 15%. 2. The selling price decreases by $1.50 per unit, and the number of units sold increases by 25%. 3. The selling price increases by $1.50 per unit, fixed expenses increase by $20,000, and the number of units sold decreases by 5%. 4. The selling price increases by 12%, variable expenses increase by 60 cents per unit, and the number of units sold decreases by 10%