Retire, or at least change the material that pennies and nickles are made of.

From the most recent sources, it costs the united states 1.83 cents to make each penny, and 11.18 cents to make each nickle. From a practical standpoint continuing to print these coins is nothing put a drain on the economy. It cost the U.S. mint 55 million dollars subsidize these pennies. The United States could save around 100 million dollars a year if these two coins where taken of of service, or if the materials they are made of where switched to something more representative of their value.