SQL Query

Hi All,
 
 Iam trying to sum field and then converting it into decimal.
The orginal field type is packed with no decimal.
 
SELECT DEC(SUM(Field),11,2) FROM File WHERE ABBA = 111483                                                         
 
Output of the query
 
  DEC 
  4,325.00
 
But the output what I wanted is 43.25
 
Not sure how to achieve the task. Can you some one please suggest.
 
Thanks in advace.
 
Jo