Math Quiz — NYT Learning Network

Through Math for America, I am part of an ongoing collaboration with the New York Times Learning Network.  My latest contribution, a Test Yourself quiz-question, can be found here:

Test Yourself Math — February 27, 2013

This question pertains to the gambling addiction of the former mayor of San Diego, who reportedly wagered over a billion dollars in casinos over the past ten years.  On average, how much did she lose a day?