definiens: means the Consumer Price Ind ex for All Urban Consumers ( CPI - U ) U.S. City Averag e, by expenditure category and commodity and service g roup, for the food and beverages expenditure catego ry, as published by the United States Department of Labor, Bureau of Labor Statistics ( 1982 - 84 = 100 ) . If the 1982 - 84 base of the Consumer Price Index is hereafter chang ed, then the new base will be converted to the 1982 -84 base and the base as so converted shall be used . In the event that the Bureau ceases to publish the Consume r Price Index at least once a year, then the successor or m ost nearly comparable Index thereto selected by SEN OMYX and approved by PEPSICO shall be used . Changes in t he Consumer Price Index will be measured based on annual average ( e.g. percent change in annual avera ge from 2010 to 2011 )