Final answer:
The Consumer Price Index (CPI) is a monthly index that measures the changes in prices of a fixed basket of goods purchased by a typical consumer in an urban area.
Step-by-step explanation:
The Consumer Price Index (CPI) is a monthly index that measures the changes in prices of a fixed basket of goods purchased by a typical consumer in an urban area. It is a measure of inflation that U.S. government statisticians calculate based on the price level from a fixed basket of goods and services that represents the average consumer's purchases.