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 | Tries for | Tries against | Try bonus | Losing bonus | Points |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Club | Played | Won | Drawn | Lost | Points for | Points against | Tries for | Tries against | Try bonus | Losing bonus | Points |
| Burry Port RFC | 20 | 18 | 0 | 2 | 438 | 180 | 64 | 23 | 8 | 0 | 80 |
| Cefneithin RFC | 20 | 15 | 0 | 5 | 379 | 206 | 55 | 25 | 6 | 3 | 69 |
| Aberaeron RFC | 20 | 13 | 0 | 7 | 369 | 232 | 49 | 28 | 6 | 5 | 63 |
| Penygroes RFC | 20 | 10 | 0 | 10 | 355 | 307 | 46 | 42 | 4 | 5 | 49 |
| Llandybie RFC | 20 | 9 | 0 | 11 | 377 | 376 | 48 | 52 | 5 | 6 | 47 |
| Furnace United RFC | 20 | 9 | 0 | 11 | 312 | 295 | 46 | 36 | 4 | 7 | 47 |
| Fishguard and Goodwick RFC | 20 | 9 | 0 | 11 | 261 | 321 | 31 | 41 | 2 | 5 | 43 |
| Llangwm RFC | 20 | 7 | 1 | 12 | 325 | 357 | 45 | 49 | 4 | 9 | 43 |
| St. Davids RFC | 20 | 9 | 0 | 11 | 256 | 494 | 32 | 69 | 1 | 2 | 39 |
| St. Clears RFC | 20 | 7 | 1 | 12 | 235 | 316 | 30 | 48 | 3 | 4 | 37 |
| Pontyates RFC | 20 | 3 | 0 | 17 | 230 | 453 | 29 | 62 | 2 | 6 | 20 |
Question:
Name the tries against when tries for is 30
Answer:
48.0