This document discusses money, inflation, and monetary policy. It defines money and inflation, and explains the classical theory that inflation is caused by increasing the money supply. Historical inflation rates are provided from the 19th century to 1990s. The quantity theory of money holds that the price level is determined by the money supply. Hyperinflation occurs when prices rise over 50% per month due to too much money printing. The costs of inflation include shoe leather costs, menu costs, and redistribution of wealth. Monetary policy aims to balance money supply and demand to achieve price stability.