QUESTION 4 Giannini Inc. has provided the following contribution format income statement. All questions concern situations that are within the relevant range. Sales (6,000 units) $ 300,000 Variable expenses 180,000 Contribution margin 120,000 Fixed expenses 96,000 Net operating income $ 24,000 Required: a. What is the contribution margin per unit? b. What is the contribution margin ratio? c. What is the variable expense ratio? d. If sales increase to 6,100 units, what would be the estimated increase in net operating income? e. If sales decline to 5,800 units, what would be the estimated net operating income? f. If the selling price increases by $8 per unit and the sales volume decreases by 400 units, what would be the estimated net operating income? g. If the variable cost per unit increases by $10, spending on advertising increases by $6,000, and unit sales increase by 900 units, what would be the estimated net operating income? h. What is the break-even point in unit sales? i. What is the break-even point in dollar sales? j. Estimate how many units must be sold to achieve a target profit of $108,000. k. What is the margin of safety in dollars? 1. What is the margin of safety percentage? m. What is the degree of operating leverage? n. Using the degree of operating leverage, what is the estimated percent increase in net operating income of a 15% increase in sales volume