Brewster's is considering a project with a life of 5 years, an initial cost of $150,000, and a discount rate of 10 percent. The firm expects to sell 2,400 units a year at a cash flow per unit of $25. The firm will have the option to abandon this project after three years at which time it could sell the project for $40,000. At what level of sales should the firm be willing to abandon this project at the end of the third year?