According to salary surveys conducted by the National Association of Colleges and Employers (NACE), mechanical engineering graduates with a master's degree earned an average starting salary of $66,158 in 2009 and $69,954 in 2010.
There was more fuel on-board for the auxiliary propulsion systems and for the various modules, but the above was the fuel used to get the payload into space and to the moon. That's a total of 3,787,350 liters of fuel, or just over 1 million gallons of liquid fuel with a fuse! Wow! Of interest: Europe is preparing plans to join the U.S. in building a manned spaceship that will take men and women to the moon.
The ESA SMART-1 lunar probe was launched on September 27th 2003 and used a revolutionary ion engine to propel it to the Moon. SMART-1 slowly spiralled out from the Earth to arrive at its destination one year, one month and two weeks later on November 11th 2004. SMART-1 may have been slow, but it was by far the most fuel efficient. The craft used only 82 kg of xenon propellant for the entire mission (ending with a lunar impact in 2006).