| Sold | Grade | Monthly Average |
| Jul 2019 | 9.4 | $4.00 |
| Jun 2019 | 9.4 | $3.70 |
| Jun 2018 | 9.4 | $4.40 |
| May 2018 | 9.4 | $3.99 |
| Apr 2018 | 9.4 | $3.99 |
| Mar 2018 | 9.4 | $3.99 |
| Feb 2018 | 9.4 | $3.99 |
| Mar 2019 | 8.0 | $3.15 |
| Nov 2018 | 8.0 | $3.30 |
| Oct 2018 | 8.0 | $3.20 |
| Sep 2018 | 8.0 | $3.40 |
| Jul 2018 | 8.0 | $3.20 |
| Apr 2018 | 8.0 | $3.19 |
| Mar 2018 | 8.0 | $3.19 |
| Feb 2018 | 8.0 | $3.19 |
| Mar 2018 | 6.0 | $2.39 |