I want to know the answer to the following question:
How many commanly cited estimates did the body report on?
All the background I'm provided with is that "The GAO report explained that the sources – a Federal Bureau of Investigation (FBI) estimate, a Customs and Border Protection (CBP) press release and a Motor and Equipment Manufacturers Association estimate – "cannot be substantiated or traced back to an underlying data source or methodology."". Is that enough to answer the question?