* fix: price list with 0 value are ignored Steps to reproduce: 1. Create 2 item price for two different supplier. One of them should be zero. 2. Create PO 3. Add supplier with non-zero price and add item. 4. change supplier. Price won't change. If price was non-zero it would've changed. Root cause: falsiness check instead of null value check is used for checking if price list value exists. 0 is evaluated as false. * refactor: make get_price_list_rate function pure
Plan and manage manufacturing operations, bill of materials for manufacturing.