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. (Unless otherwise stated, consider each requirement separately.) f. 1. Calculate the monthly operating income (or loss) that would result from a $1 per unit price increase and a $5,000 per month increase in advertising expenses, both relative to the original data. Assume a sales volume of 7,200 units per month. 2. Is the increase in advertising expense justified by the price increase? Complete this question by entering your answers in the tabs below. Required F1 Required F2 Calculate the monthly operating income (or loss) that would result from a $1 per unit price increase and a $5,000 per month increase in advertising expenses, both relative to the original data. Assume a sales volume of 7,200 units per month. Operating income