user
Instruction
Answer the question based on the provided table.


Table
Table Title: M6 Toll
Table Content:
| Date introduced | Class 1 (e.g. Motorbike) | Class 2 (e.g. Car) | Class 3 (e.g. Car with trailer) | Class 4 (e.g. Van) | Class 5 (e.g. HGV) |
| --- | --- | --- | --- | --- | --- |
| 9 December 2003 | £1.00 | £2.00 | £5.00 | £5.00 | £10.00 |
| 23 July 2004 | £1.00 | £2.00 | £5.00 | £5.00 | £6.00 |
| 16 August 2004 | £2.00 | £3.00 | £6.00 | £6.00 | £6.00 |
| 14 June 2005 | £2.50 | £3.50 | £7.00 | £7.00 | £7.00 |
| 1 January 2008 | £2.50 | £4.50 | £8.00 | £9.00 | £9.00 |
| 1 January 2009 | £2.70 | £4.70 | £8.40 | £9.40 | £9.40 |
| 1 March 2010 | £2.70 | £5.00 | £9.00 | £10.00 | £10.00 |
| 1 March 2011 | £3.00 | £5.30 | £9.60 | £10.60 | £10.60 |
| 1 March 2012 | £3.00 | £5.50 | £10.00 | £11.00 | £11.00 |


Question
what is the difference in price from class 1 to class 3 on december 9 of 2003?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["£4.00"]