Monterey Co. makes and sells a single product. The current selling price is $15 per unit. Variable expenses ate $9 per unit, and fixed expenses total $27,000 per month.

f-1. Calculate the monthly operating income that would result from a $1 per unit prive increase and a $6,000 per month increase in advertising expense, both relative to the orginial data. Assume a sale volume of 5,400 units per month.