A law firm is contemplating an unorthodox project of the selling of a machine today that will result in an immediate inflow of $450. Without the use of the machine the law firm will incur an annuity of outflows of $73 per year that begin at the end of year one, and continue for 6 consecutive years. The required rate of return is 7.60%. What is the project's net present value (NPV)? Use four decimal points