Yellow Sticker Company's variable expenses are 40% of sales. The company has monthly fixed expenses of $15,000 and sells each unit for $0.50. The monthly target operating income is $7,500. a. What is the monthly margin of safety in dollars if Yellow Sticker Company achieves its operating income goal? $0 in dollars b. What is the monthly margin of safety in units if Yellow Sticker Company achieves its operating income goal? 0 units