A geomatics engineer wants to purchased a highly accurate GPS surveying system. The unit costs $36,000, has a useful life of 5 1/2 years, and can be sold at the end of its life for $3,000. In addition, a maintenance and supplies payment of $1500 will be made every six months.Assuming an annual interest rate of 12%, with monthly compounding, use a Present Worth Analysis method to determine the present cost of owning and operating the GPS unit.