I have the following table as a cross-tab which gives me the data for 2010 and 2011. I want to add a calculated line (for example 'Difference' in my table below) as a third line which will give me the difference of the two line (2010 - 2011). Can anyone please help me how to do that.
| Year | fruit | Vegetable | Rice | Wheat |
| 2010 | 50 | 10 | 100 | 55 |
| 2011 | 49 | 8 | 90 | 49 |
| Difference | 1 | 2 | 10 | 6 |
Thanks Brian.