The following pie-chart shows the percentage distribution of the expenditure incurred in publishing a magazine. Study the pie-chart and answer the question based on it.
Various Expenditures (in percentage) Incurred in publishing a Magazine
The price of the magazine is marked $20\%$ above the $C.P$. If the marked price of the magazine is ₹ $180$, then what is the cost of the paper used in a single copy of the magazine ?