You purchased a building five years ago for $100,000. Its annual maintenance expense has been $5,000 per year. At the end of three years, you spent $9,000 on roof repairs. At the end of five years (now), you sell the building for $120,000. During the period of ownership, you rented the building for $10,000 per year paid at the beginning of each year. Use the AW method to evaluate this investment when you MARR is 12% per year.