discount-engine

To calculate multiple discounts on a shopping cart without conflicts, use a deterministic pipeline that filters active promotions, checks conditions, sorts by priority, and enforces non-stackable rules to output an auditable discount allocation set.

A priority-aware promotion engine handles discount stacking by sorting all active promotions by priority, distinguishing automatic versus coupon-based discounts, and enforcing non-overlapping rules to prevent conflicting cart-wide or line-item allocations.

Yes, you can apply buy-N-get-M and free shipping promotions to the same cart by evaluating common discount types across cart-wide, line-item, and shipping scopes while enforcing non-stackable rules to ensure correct allocations.

The best way to allocate fixed amount and percentage off promotions is using a deterministic pipeline that checks conditions, sorts by priority, and computes non-conflicting discount allocations across line items to protect profit margins.

To track and audit applied promotions for ROI analysis, use a platform-agnostic discount engine that evaluates conditions, computes allocations, and persists an auditable result set detailing which active discounts were applied to the cart.

Non-stackable promotions overlap and apply incorrect cart discounts when the evaluation pipeline lacks strict priority sorting and non-conflicting allocation enforcement to prevent multiple high-priority rules from applying to the same line items simultaneously.