The table below shows the daily expenditure on food of 25 households in a locality. \(\begin{array}{|c|c|c|c|c|c|}\hline \text{Daily expenditure (in ₹)} & 100 - 150 & 150 - 200 & 200 - 250 & 250 - 300 & 300 - 350 \\ \hline \text{Number of households} & 4 & 5 & 12 & 2 & 2 \\ \hline \end{array}\) Find the mean daily expenditure on food by a suitable method.