| WTP bid (Thousand VND) | Interval (Thousand VND) | Average | (%) | Weight Average (Thousand VND) |
| 0 | 0 - 5 | 2.5 | 57.0 | 1.42 |
| 5 | 5 - 10 | 7.5 | 9.0 | 0.68 |
| 10 | 10 - 20 | 15 | 4.3 | 0.65 |
| 20 | 20 - 40 | 30 | 10.4 | 3.12 |
| 40 | 40 - 50 | 45 | 1.4 | 0.63 |
| 50 | 50 - 100 | 75 | 11.8 | 8.85 |
| 100 | 100 - 150 | 125 | 5.2 | 6.50 |
| 150 | 150 - 200 | 175 | 0.5 | 0.88 |
| 200 | 200 - 250 | 225 | 0.5 | 1.13 |
| 250 | 250 - 300 | 275 | 0.0 | 0.00 |
| Total: |
|
| 100.0 | 23.84 |