The sale_extra module allows to add extra line on sale based on criteria.
The extra products are added when the sale goes into quotation but the added lines can be modified when going back to draft.
The criteria are defined by the Sale Extras of the Price List.
Each matching Sale Extra is evaluated to add an extra line. The criteria are the fields:
Once a Sale Extra is selected, its first line that match the line’s criteria is used to setup the extra line. The criteria are the fields:
The sale line is setup using the fields: