A real estate investor has a 30 year lease on a plot of land. He gets estimates on the cost and income of various types of building projects on the piece of land as follows: Building type Cost of the building($) A B C D Apartment house Theater Department store Office building 300,000 200,000 250,000 400,000 Net profit per year 69,000 40,000 55,000 76,000 Each building type is expected to have a salvage value equal to 20% of its initial cost. If the investor requires a minimum attractive rate of return of at least 12%. Which building type (if any) he would build?. A B