The Consumer Price Index is used to calculate inflation, or the change in price of a basket of goods and services, as it impacts consumers; whereas, the Producer Price Index measures changes in selling prices, thereby expressing price changes from the perspective of the seller who produces a particular commodity.
A slide presentation updated with April 2013 data shows the Midwest inflation rate increased from March to April for urban metros, with a population less than 1.5 million, and non-metro urban areas.
The Producer Price Index data shows that prices in the United States have increased from April 2012 to April 2013 for aircraft, natural gas, sorghum and wheat.