Miller Company's contribution format income statement for the most recent month is shown below: Per Unit Total $396,000 264,000 Sales (44,000 units) Variable expenses $9.00 6.00 Contribution margin 3.00 132,000 Fixed expenses 43,000 89,000 Net operating income Required: (Consider each case independently): 1. What is the revised net operating income if unit sales increase by 20 % ? 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 19% ? 3. What is the revised net operating income if the selling price increases by $1.30 per unit, fixed expenses increase by $6,000, and the number of units sold decreases by 2%? 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 15%