Article: During his annual state-of-the-nation address on September 2, 2014, President of Mexico Enrique Peña Nieto unveiled plans for a new international airport to ease the city's notorious air traffic congestion, tentatively slated for a 2018 opening. The new airport, which would have six runways, will cost $9.15 billion and would be built on vacant federal land east of Mexico City International Airport. Goals are to eventually handle 120 million passengers a year, which would make it the busiest airport in the world.

Now answer this question: How much does the new airport cost?
$9.15 billion