<Tr> <Th_colspan="2"> Footnotes </Th> </Tr> <Tr> <Td_colspan="2"> Measurable benefits of GAO work total $49.9 billion, a return of $87 for every dollar invested; at the end of FY 2010, over 80% of the GAO recommendations made in FY 2006 had been implemented . </Td> </Tr> <P> The Government Accountability Office (GAO) is a legislative branch government agency that provides auditing, evaluation, and investigative services for the United States Congress . It is the supreme audit institution of the federal government of the United States . </P> <P> Mission of GAO is to: </P>

What is the function of the general accounting office