Is there a way to adjust POs down if the total amount was not spent to add money back to the Blanket contract? An example would be I have a blanket contract for $2M and I issue a PO for $1M (an estimate to what the job would cost) which leaves $1M left on the blanket. After the job is finished and invoiced completely it only came in at $800k. Can I reduce the PO to $800K and the money would go back to the blanket so that $1.2M is left on the blanket?