Miller Company's contribution format income statement for the most recent month is shown below: Per Unit Total $ Sales (34,000 units) $ 7.00 238,000 Variable expenses 136,000 4.00 $ Contribution margin 102,000 3.00 Fixed expenses 47,000 Net operating income $ 55,000 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 $1.30 per unit and the number of units sold increases by 21%? 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 6%? 4. What is the revised net operating income if the selling price per unit increases by 10%, 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 Last month when Holiday Creations, Incorporated, sold 40,000 units, total sales were $160,000, total variable expenses were $120,000, and fixed expenses were $38,200. Required: 1. What is the company's contribution margin (CM) ratio? 2. What is the estimated change in the company's net operating income if it can increase sales volume by 600 units and total sales by $2,400? (Do not round intermediate calculations.) 1. Contribution margin ratio 2. Estimated change in net operating income %