On January 1, 20x1 Irwin, Inc. bought a patent for $120,000. At the time of purchase, management estimated that the patent had a useful life of 15 years. On January 3, 20x4, the company determined that the usefulness of the patent would expire at the end of 20x9. How much should Irwin record as amortization expense for this patent for 20x4? (Round your answer to the nearest dollar amount.)