You are considering an investment that will cost $15,000 and generate returns of $4,000 at the end of year 1, $5,000 at the end of year 2, $6,000 at the end of year 3 and $3,000 at the end of year 4. Calculate the NPV of the investment using a cost of capital of j-7.0%. Round your answer to the nearest dollar. 4