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Required information [The following information applies to the questions displayed below.] Marathon Company makes and sells a single product. The current selling price is $18 per unit. Variable expenses are $12 per unit, and fixed expenses total $36,000 per month. (Uniess otherwise stated, consider each requirement separately.) Required: a. Calculate the breakeven point expressed in terms of total sales dollars and sales volume. Marathon Company makes and sells a single product. The current selling price is $18 per unit. Variable expenses are $12 per unit, and fixed expenses total $36,000 per month. (Unless otherwise stated, consider each requirement separately) b. Calculate the margin of safety and the margin of safety ratio. Assume current sales are $120,000. [The following information applies to the questions displayed below.] Marathon Company makes and sells a single product. The current selling price is $18 per unit. Variable expenses are $12 per unit, and fixed expenses total $36,000 per month. (Unless otherwise stated, consider each requirement separately.) c. Calculate the monthly operating income (or loss) at a sales volume of 7,200 units per month