Answer the questions based on the following pie charts, which show the break-up of operating profit into Interest, Tax, Retained profit, Dividend and Depreciation.
| Year | Operating Profit (Rs. lakh) | Interest | Tax | Retained profit | Dividend | Depreciation |
|---|---|---|---|---|---|---|
| 1990-91 | 130 | 30% | 9% | 25% | 8% | 28% |
| 1991-92 | 160 | 40% | 12% | 20% | 8% | 20% |
