Minden Company manufactures a high-quality wooden birdhouse that sells for $20 per unit. The variable costs are $6 per unit and the company sold 42,000 of the birdhouses to customers in 2026. The break-even point in 2026 was 12,000 birdhouses. The president of Minden Company believes the following changes should be made in 2027: 1. the selling price of the birdhouse should be decreased by 10% 2. increase advertising by $30,000 Assume these changes are made. Calculate the number of birdhouses Minden Company must sell in 2027 in order to break-even.