Comprehension Passage
The following table shows the percentage distribution of the expenditure incurred in publishing a book. Study the table and answer the questions based on it.
Various Expenditures (in percentage) Incurred in Publishing a Book
| Budget head | Expenditure incurred (in percentage) |
| Promotion cost | 10% |
| Printing cost | 20% |
| Transportation cost | 10% |
| Paper cost | 25% |
| Binding | 20% |
| Royalty | 15% |
The price of the book is marked 20% above the cost price. If the marked price of the book is Rs. 180, then what is the cost of the paper used in a single copy of the book?
1
Rs. 36
2
Rs. 37.50
3
Rs. 42
4
Rs. 44.25