****** Design ****** The *Purchase Price List Module* extends the following concepts: .. _model-party.party: Party ===== When the *Purchase Price List Module* is activated, :doc:`Price List <product_price_list:index>` can also be defined for use with purchases from the party. .. seealso:: The `Party <party:model-party.party>` concept is introduced by the module :doc:`Party Module <party:index>`. .. _model-purchase.purchase: Purchase ======== When the *Purchase Price List Module* is activated, the unit price of a product is calculated using the :doc:`Price List <product_price_list:index>` if one is defined for the supplier and if the `Product <product:concept-product>` does not have a `Product Supplier Price <purchase:model-purchase.product_supplier>`. .. seealso:: The `Purchase <purchase:model-purchase.purchase>` concept is introduced by the module :doc:`Purchase Module <purchase:index>`.