| WTP (1000 VND) | Number of respondents | Percentage (%) |
| 2.00 | 1 | 2.8 |
| 30.00 | 1 | 2.8 |
| 40.00 | 1 | 2.8 |
| 50.00 | 11 | 30.6 |
| 100.00 | 13 | 36.1 |
| 150.00 | 3 | 8.3 |
| 200.00 | 5 | 13.8 |
| 400.00 | 1 | 2.8 |