You have made a mistake while calculating Weights(W). You have calculated W by multiplying ${P}_{0}$ and ${P}_{1}$. However, W is calculated by multiplying base year prices ${P}_{0}$ with the base year quantity ${Q}_{0}$. You have also committed a mistake while calculating R corresponding to commodity E. R is calculated as . In case of commodity E you have calculated the value of R by taking