# Use cases

- [Promotions](/rules-engine/use-cases/promotions.md): A list of the most common application scenarios of Commerce Layer Rules Engine to the flex promotion resource
- [Discount line items based on item's price](/rules-engine/use-cases/promotions/get-fixed-amount-off-price-gteq.md): Rule breakdown, resource payload analysis, and outcomes explanation
- [Get a discount when paying by credit card](/rules-engine/use-cases/promotions/get-percentage-discount-credit-card.md): Rule breakdown, resource payload analysis, and outcomes explanation
- [Discount an order based on promo item and total number of items](/rules-engine/use-cases/promotions/get-percentage-discount-promo-item-number-of-items-gteq.md): Rule breakdown, resource payload analysis, and outcomes explanation
- [Offer a specific shipping method for free in a specific country](/rules-engine/use-cases/promotions/free-shipping-method-by-country.md): Rule breakdown, resource payload analysis, and outcomes explanation
- [Discount items with large stock availability](/rules-engine/use-cases/promotions/get-percentage-discount-quantity-gteq.md): Rule breakdown, resource payload analysis, and outcomes explanation
- [Discount all the SKU in an order based on the shipping country](/rules-engine/use-cases/promotions/get-percentage-discount-by-shipping-country.md): Rule breakdown, resource payload analysis, and outcomes explanation
- [Discount all the SKU in an order based on the customer email domain](/rules-engine/use-cases/promotions/get-percentage-discount-by-email.md): Rule breakdown, resource payload analysis, and outcomes explanation
- [Price lists](/rules-engine/use-cases/price-lists.md): A list of the most common application scenarios of Commerce Layer Rules Engine to the price list resource
- [Discount all prices greater than or equal to a specific value](/rules-engine/use-cases/price-lists/discount-prices-gteq.md): Rule breakdown, resource payload analysis, and outcomes explanation
- [Discount specific SKUs for new clients](/rules-engine/use-cases/price-lists/discount-specific-skus-for-new-clients.md): Rule breakdown, resource payload analysis, and outcomes explanation
- [Change strike-through price based on customer email domain](/rules-engine/use-cases/price-lists/update-compare-at-price-by-email.md): Rule breakdown, resource payload analysis, and outcomes explanation