| 0.01 21 cost | 0.000001 NXT |
| 0.1 21 cost | 0.000014 NXT |
| 0.2 21 cost | 0.000027 NXT |
| 1 21 cost | 0.000136 NXT |
| 5 21 cost | 0.000680 NXT |
| 10 21 cost | 0.001360 NXT |
| 50 21 cost | 0.006802 NXT |
| 100 21 cost | 0.013604 NXT |
| 1000 21 cost | 0.136038 NXT |
| 10000 21 cost | 1.360383 NXT |
| 100000 21 cost | 13.603833 NXT |