Demand for a company's product is expected to increase significantly in the upcoming year, resulting in additional direct labor overtime costs of $2 per unit. The production manager expects that the higher volume will increase annual maintenance costs on the company's manufacturing equipment by $20,000. Fixed costs currently average $500,000 per year, and the company's contribution margin per unit is currently $27. Based on this information, the production manager estimates that the company must produce and sell units to achieve a target operating income of $250,000 in the upcoming year