A company plans to spend $ 153972 to install a new machine. Annual maintenance cost is $ 11467. Estimated annual income is $34485 starting in the first year. This revenue begin increasing by $ 1439 per year at the end of 2nd year and continue increasing through the end of 15 years. The market value of the machine is $26733 at the end of study period of 15 years. Determine the annual worth if the minimum attractive rate of return is 9% per year