```
+----+------------+---------+-----------+
| id | type_id    | grammage| price     | 
+----+------------+---------+-----------+
|  1 | 1          |      20 |        44 |
|  2 | 1          |      50 |        80 | 
|  3 | 1          |     100 |       110 | 
|  4 | 1          |     250 |       180 | 
|  5 | 1          |     500 |       250 | 
+----+------------+---------+-----------+

```

I want to select price per grammage 
Exemple : select 150 gram