Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Club | Played | Won | Drawn | Lost | Points for | Points against | Bonus points | Points |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Biarritz Olympique | 26 | 19 |  | 7 | 694 | 350 | 14 | 90 |
| Stade Français | 26 | 19 |  | 7 | 633 | 437 | 13 | 89 |
| Stade Toulousain | 26 | 19 |  | 7 | 713 | 427 | 12 | 88 |
| USA Perpignan | 26 | 18 |  | 8 | 671 | 398 | 12 | 84 |
| SU Agen | 26 | 15 |  | 11 | 655 | 540 | 10 | 70 |
| CS Bourgoin-Jallieu | 26 | 14 |  | 12 | 591 | 516 | 11 | 67 |
| Castres Olympique | 26 | 13 |  | 13 | 685 | 559 | 14 | 66 |
| ASM Clermont | 26 | 14 |  | 12 | 577 | 569 | 7 | 63 |
| CA Brive | 26 | 10 | 1 | 15 | 431 | 553 | 9 | 51 |
| RC Narbonne | 26 | 11 |  | 15 | 533 | 775 | 3 | 47 |
| Montpellier RC | 26 | 9 | 0 | 17 | 574 | 659 | 10 | 46 |
| Aviron Bayonnais | 26 | 8 | 1 | 17 | 514 | 669 | 9 | 43 |
| Section Paloise | 26 | 9 | 0 | 17 | 476 | 790 | 4 | 40 |
| RC Toulonnais | 26 | 3 | 0 | 23 | 332 | 837 | 7 | 19 |
Question:
what is the difference in the total points for the club biarritz olympique and su agen?
Answer:
20