| Class | SaleItem | An item in a sale. |
| Class | DeliveryItem | Class responsible to store all the products for a certain delivery |
| Class | SaleItemAdaptToDelivery | A service implementation as a delivery facet. |
| Class | Sale | Sale object implementation. |
| Class | SaleAdaptToPaymentTransaction | No class docstring; 4/21 methods documented |
| Class | SaleView | Stores general informatios about sales |
| Class | DeliveryView | Stores general informatios items that will be delivered. |