Porter Company's most recent contribution format income statement is shown below: 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 50 cents per unit, and the number of units sold increases by 20%. 3. The selling price increases by 50 cents per unit, fixed expenses increase by $10,000, and the number of units sold decreases by 5%. 4. Variable expenses increase by 20 cents per unit, the selling price increases by 12%, and the number of units sold decreases by 10%