diff --git a/purchase.py b/purchase.py
index 12d02a9..cc4a4b4 100644
--- a/purchase.py
+++ b/purchase.py
@@ -131,6 +131,10 @@ class Line(metaclass=PoolMeta):
             self.software_version = None
             self.health_register = None
             self.refurbish = None
+            self.quantity = None
+            self.unit_price = None
+            self.unit = None
+
 
             return