# Design

The Account Stock Shipment Cost Module extends and introduces the following concepts:

## Product

When the Account Stock Shipment Cost Module is activated, products gain some extra properties. This includes a new check-box “Shipment Cost” which is used to indicate that the service is used as the cost for Shipments <stock:concept-stock.shipment>.

See also

The Product <product:concept-product> concept is introduced by the Product Module.

## Shipment Cost

Shipment Costs define which posted supplier Invoice <account_invoice:model-account.invoice> lines are linked to which Shipments <stock:concept-stock.shipment>. When the Shipment Cost is posted, the costs from the shipments are added up and then split up and reallocated to the shipments.

See also

Shipment Costs can be found by opening the main menu item:

> Financial ‣ Invoices ‣ Shipment Costs