Not every customer pays base price. You might want to apply discounts for bulk purchases or uplifts for special configurations. Price adjustment schedules allow you to define rules for discounts or uplifts:
- Range: A discount applies to all units once a threshold is reached (e.g., 10% off all pens after buying 30).
- Slab: A discount applies only to units above a threshold (e.g., full price for the first 30, discounted price for the rest).
These schedules use tiers, with each tier having inclusive lower bounds and exclusive upper bounds—a subtle but important distinction.