Also, PO-H allows you to have multiple entries for the same vendor under the same part number.  If you don't look up the part number first, to see if it already has entries,  you can enter the same vendor under the same part number multiple times.   When this happens, which price does the system use?   It would be great if a warning would come up, or the existing entry would come up.
 
Tara Cook
APA, Inc.