FILE - This undated file photo provided by the U.S. Mint shows the President John Adams presidential $1 coin. Congressional auditors say doing away with dollar bills entirely and replac

 

              FILE - This undated file photo provided by the U.S. Mint shows the President John Adams presidential $1 coin. Congressional auditors say doing away with dollar bills entirely and replac
FILE - This undated file photo provided by the U.S. Mint shows the President John Adams presidential $1 coin. Congressional auditors say doing away with dollar bills entirely and replacing them with dollar coins could save taxpayers some $4.4 billion over the next 30 years. (AP Photo/US Mint, File)