Dressy, Inc. wants to purchase a sewing machine that will help generate annual profits for the company. In the first year, the profit will be $7,000. In the second year, $8500. In the third year $6400. After the third year, the machine will be useless and can only be thrown away. What is the maximum purchase price Dressy should pay for the sewing machine if it wants to earn at least a 5% rate of return on the investment?