diff --git a/src/budy/models/bundle.py b/src/budy/models/bundle.py
index 498eae8c..7661c4c1 100644
--- a/src/budy/models/bundle.py
+++ b/src/budy/models/bundle.py
@@ -143,6 +143,13 @@ def order_name(self):
     def line_cls(cls):
         return bundle_line.BundleLine
 
+    @classmethod
+    def eval_shipping(cls, *args, **kwargs):
+        shipping = appier.conf("BUDY_SHIPPING", None)
+        if not shipping: return 0.0
+        shipping = eval(shipping)
+        return shipping(*args, **kwargs)
+
     def pre_validate(self):
         base.BudyBase.pre_validate(self)
         self.calculate()
@@ -305,10 +312,8 @@ def build_taxes(self):
         return 0.0
 
     def build_shipping(self):
-        shipping = appier.conf("BUDY_SHIPPING", None)
-        if not shipping: return 0.0
-        shipping = eval(shipping)
-        return shipping(self.sub_total, self.taxes, self.quantity)
+        cls = self.__class__
+        return cls.eval_shipping(self.sub_total, self.taxes, self.quantity)
 
     def collect_empty(self):
         empty = []
diff --git a/src/budy/models/product.py b/src/budy/models/product.py
index 21b43b67..a509597a 100644
--- a/src/budy/models/product.py
+++ b/src/budy/models/product.py
@@ -43,6 +43,7 @@
 import appier
 
 from . import base
+from . import bundle
 
 class Product(base.BudyBase):
 
@@ -408,6 +409,13 @@ def simple_csv_url(cls, absolute = False):
             absolute = absolute
         )
 
+    @classmethod
+    def _build(cls, model, map):
+        price = model.get("price", None)
+        if price == None: shipping_cost = None
+        else: shipping_cost = bundle.Bundle.eval_shipping(price, 0.0, 0.0)
+        model["shipping_cost"] = shipping_cost
+
     def pre_save(self):
         base.BudyBase.pre_save(self)
         if not self.measurements: return