I've been trying to find a way using Drupal Commerce to be able to give discounts on individual item prices based on quantity. For instance:
1-9 units of product A: $1.99 per unit
10-19 units of product A: $1.75 per unit
1-19 units of product B: $2.99 per unit
20-39 units of product B: $2.60 per unit
and so on and so forth. However, I haven't been able to find any documentation or modules to do this. Is there any way to do this with Rules, or any modules?