es Required information [The following information applies to the questions displayed below.] Monterey Co. makes and sells a single product. The current selling price is $15 per unit. Variable expenses are $9 per unit. and fixed expenses total $27,000 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 $6,000 per month increase in advertising expenses, both relative to the original data. Assume a sales volume of 5,400 units per month. Operating income