Southwest Airlines is considering buying a new Boeing 737. The airplane will cost 30 million dollars today and then generate 9 million dollars per year for the next 12 years. After 12 years, the airplane will not generate any cash for Southwest Airlines. If the cost of capital is 8%, what is the NPV (in millions of dollars) of buying the new airplane? (Enter your answer in millions. i.e. 5.5 million, not 5,500,000 )