Hi udog ,
No. I'm sorry. Purchase Orders Pro doesn't affect Stock Central views.
Did you read the two posts I linked to? Both formulas are explained there.
And no, we don't provide developer docs. I'm sorry. Our support also does not include custom coding.
All our plugins are well-documented within the code, and all our hooks have self-descriptive names. And of course, we are open to adding new hooks if asked for and consider them necessary.
Best Regards,
José Andrés