(257) Failure Begets Failure

I want to know how many tax dollars go into investigating the cause of the crash of NASA's Mars Climate Orbiter. I understand that it's an unmanned craft and that NASA had just wasted $300+ million and two years of research; but what exactly do they mean when they say that they are going to investigate the cause of the incident? Are they going to invest millions more in a conversion calculator? The development team and navigating team seem to be blaming each other; but what if artists nouveau devised a conspiratorial plot to create abstract art on the surface of Mars?