Can anyone provide guidance on how to enter a PO and then apply invoices against it?    It seems like a simple process, but Sage does not handle it in a way that makes sense to me.  Here's what I did:

Entered a PO for the Plumbing Fixture Allowance using Qty 1 and price  $3063.  This PO now shows on my Committed Cost report, which is what I want. 

I then entered an invoice for Qty of 1 for  $216, which represents part of the Order.  I applied it to the PO which I thought would lower the committed cost by the $216.00, but that didn't happen.  Instead, the PO now shows a qty of 1 received and put the entire 3063 as "received" , not the $216.   Apparently POs track Qty and not value. 

Is there a way in Sage track the costs, not qty, against a PO?