Suppose the farm equipment manufacturer from the previous question was able to charge $30,000 per tractor, and produces and sells 2,000 tractors per year at that price. As a reminder, the company originally spent $3 million in research and development costs. The company now spends $20 million at the beginning of each year to rent a factory, and $10,000 per tractor in materials and wages. If another manufacturer enters the market in the middle of a year and engages the company in a price war, what is the lowest price the company would be willing to charge for each tractor?