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.) Management is considering a change in the sales force compensation plan. Currently each of the firm's twc salespeople is paid a salary of $2,500 per month. g-1. Calculate the monthly operating income (or loss) that would result from changing the compensation plan to a salary of $400 per month, plus a commission of $0.80 per unit, assuming a sales volume of 5,40 units per month