| Cost | Stated knowledge | |||
| Knows exactly | Knows approx | Do not know | Knowledge Score* | |
| Depreciation | 4.9% | 40.1% | 55% | 0.50 |
| Fuel cost | 9.5% | 68.9% | 21.6% | 0.88 |
| Interest cost | 44.4% | 19.6% | 36% | 1.08 |
| Insurance | 51.6% | 38% | 10.4% | 1.41 |
| Service and maintenance | 20.7% | 57.7% | 21.6% | 0.99 |
| Taxes | 49.1% | 35.3% | 15.6% | 1.33 |