This file defines reputation modification to store prices.
The first row indicates the player's reputation.
The second row indicates the percentage of the item's base price to charge.
In BG2EE we have:

2DA V1.0
1000
  1    2    3    4    5    6   7   8   9   10  11  12   13  14  15 16 17 18 19 20
1 1000 1000 200  150  140  130 120 120 110 100 100 100  100 100 95 90 85 80 75 70