Calculate price index number from the following data:
\[ \begin{array}{|c|c|c|c|c|} \hline \text{Commodity} & A & B & C & D \\ \hline \text{Price in 2005 (₹)} & 6 & 16 & 24 & 4 \\ \hline \text{Price in 2010 (₹)} & 8 & 18 & 28 & 6 \\ \hline \end{array} \]