<P> The indicator tracks the price movement of each commodity individually . Based on this individual movement, the WPI is determined through the averaging principle . The following methods are used to compute the WPI: </P> <Dl> <Dt> Laspeyres Formula </Dt> <Dd> It is the weighted arithmetic mean based on the fixed value - based weights for the base period . </Dd> </Dl> <Dd> It is the weighted arithmetic mean based on the fixed value - based weights for the base period . </Dd> <P> Ten - Day Price Index </P>

In rajasthan for wpi which year is taken as the base year