How to adjust purchased ordered amount in bulk

I wanted to ask for your advice regarding the process of closing old POs in bulk. Is there a way to use a web API or another method to automatically adjust the ordered amount so that it matches the invoiced amount before closing?

Currently, when we close a PO—for example, with an ordered amount of 50k but only 25k invoiced—it gets closed with the difference still showing, which leads to issues in reporting.

Would you happen to have any suggestions or know of a better way to handle this?

Thanks in advance for your help.