Marsha Jones has bought a used Mercedes horse transporter for her Connecticut estate. It cost $47,000. The object is to save on horse transporter rentals.

Marsha had been renting a transporter every other week for $212 per week plus $1.60 per mile. Most of the trips are 90 miles in total. Marsha usually gives the driver a $50 tip. With the new transporter she will only have to pay for diesel fuel and maintenance, at about $.57 per mile. Insurance costs for Marsha's transporter are $1,800 per year.

The transporter will probably be worth $27,000 (in real terms) after eight years, when Marsha's horse Nike will be ready to retire. Assume a nominal discount rate of 9% and a forecasted inflation rate of 3%. Marsha's transporter is a personal outlay, not a business or financial investment, so taxes can be ignored.Hint:All numbers given in the questions are in real terms. Assume CF at end of year, for simplicity.

Calculate the NPV of the investment

NPV =