National Aeronautics and Space Administration officials reported the costs of a 2011 employee conference 70 percent lower than what was actually spent on the event, according to the agency’s inspector general.

Though originally projecting the conference would cost $1,176,307, NASA reported after the 2011 “IT Summit Conference” in San Francisco that the bottom-line bill was $1,291,889. In fact, the IG said it found the conference cost almost $2 million.