diff --git a/webapp/controller/ActivityController.class.php b/webapp/controller/ActivityController.class.php
index b068b30..bef9e06 100644
--- a/webapp/controller/ActivityController.class.php
+++ b/webapp/controller/ActivityController.class.php
@@ -1859,7 +1859,7 @@ class ActivityController
                     'SELECT  num FROM bag WHERE accountid=:accountid AND id=:id;',
                     array(
                         ':accountid' => $account_id,
-                        ':id' => $id
+                        ':id' => $cost_strings[0]
                     )
                 );