Final answer:
Neglecting the $2,800 monthly salaries in the CVP analysis results in an incorrectly low breakeven point and inflated operating income. Recalculation is necessary to provide accurate figures.
Step-by-step explanation:
Omitting the sales personnel's monthly salaries of $2,800 in the CVP (Cost-Volume-Profit) analysis would understate the company's fixed costs. This understatement of fixed costs would result in an inaccurately low breakeven sales figure and an overestimated operating income. To correct the error, you must recalculate the breakeven point by adding the $2,800 to the fixed costs. With a higher fixed cost, the breakeven sales figure will increase. Also, the operating profit with a 15% sales increase would decrease, as the additional fixed cost of sales personnel salaries would reduce the margins.