
Assessing Performance: Designing, Scoring, and Validating Performance Tasks-
Amazon
From $37.23 (New)

From $37.23 (New)

| Last Seen | |
| Highest | $49.00 Mar 6, '16 |
| Lowest | $34.62 Sep 30, '14 |
| Average | $44.25 (30d avg) $39.72 (90d avg) $39.64 (180d avg) $39.55 (365d avg) $37.77 (Lifetime average) |
| Added | Jan 19, 2014 |
| Last Seen | |
| Highest | $43.96 Jul 24, '15 |
| Lowest | $27.04 Jan 25, '16 |
| Average | $28.19 (30d avg) $27.89 (90d avg) $33.31 (180d avg) $34.96 (365d avg) $34.84 (Lifetime average) |
| Added | Jan 19, 2014 |
| Last Seen | |
| Highest | $73.62 Oct 30, '14 |
| Lowest | $17.76 Apr 10, '16 |
| Average | $18.31 (30d avg) $21.50 (90d avg) $28.26 (180d avg) $30.40 (365d avg) $35.12 (Lifetime average) |
| Added | Jan 19, 2014 |
30 day average: 525,764
90 day average: 806,724