modules/purchase_trade/valuation.py

@@ -296,10 +296,10 @@ class ValuationBase(ModelSQL):
                 qty = round(lot.get_current_quantity_converted(), 5)
                 if sf.mode == 'ppack':
                     price = sf.price
-                    amount = sf.amount
+                    amount = sf.amount * sign
                 elif sf.mode == 'lumpsum':
                     price = sf.price
-                    amount = sf.price
+                    amount = sf.price * sign
                     qty = 1
                 else:
                     price = Decimal(sf.get_price_per_qt())