Refer to Mark Smith Company. What was the company's margin of safety? Mark Smith Company Below is an income statement for Mark Smith Company: Sales Variable costs Contribution margin Fixed costs Profit before taxes $400,000 (200,000) $200,000 (125,000) $ 75,000 Campbell Manufacturing incurs annual fixed costs of $250,000 in producing and selling a single product. Estimated unit sales are 125,000. An after-tax income of $75,000 is desired by management. The company projects its income tax rate at 40 percent. What is the maximum amount that Campbell can expend for variable costs per unit and still meet its profit objective if the sales price per unit is estimated at $6?