I apologize if this has been brought up before.  I have recently taken over the PO's from someone who left and I am trying to clean up some old, open PO's that we do not need.  When I go to PO-A and hit delete, the following note/error comes up:
 
"This Purchase Order has amounts which have been received but not invoices.  You can't delete the entire PO until all received items are invoiced."
 
If I go to PO-I-F, none of these are on there as received not invoiced.  How can I close/delete these so they don't show on PO-A anymore?  What happens to the $ amounts?  Thanks so much for any input!
 
Angela