WORK!! ATTACH WORKSHEETS IF YOU USE ADDITIONAL PAPER. PARTIAL CREDIT MAY BE AWARDED SO SHOW YOUR concern 36) zaccaria Corporation has provided the following contribution format income statement. All questions situations that are within the relevant range Sales (5,000 units) $300,000 Variable expenses Contribution margin 60,000 58,800 Fixed expenses Net operating income Required: a. What is the contribution margin ratio? b. If sales increase to 5,040 units, what would be the estimated increase in net operating income? c. If the selling price increases by $4 per unit and the sales volume decreases by 400 units, what would be the estimated net operating income? d. What is the break-even point in unit sales? e. What is the margin of safety in dollars