#. Go to *Purchase -> Products > Products* and create some record and set differente prices to vendors in Purchase tab, for example: Vendor 1: 10 and Vendor 2: 20.
#. Go to *Purchase -> Orders > Requests for Quotation* and create some record and set Vendor 1.
#. Add a line with the previously created product.
#. The unit price of the product is 10.
#. Change vendor to Vendor 2.
#. Click on the "Update lines info" button.
#. The unit price of the product is 20.
