Hello Theodosios,

Yes, the Professional edition of verson 12 includes full stock control with representations of the exact quantities on hand at the point of purchase.  The Evolution edition does not offer this functionality:

http://static.incomedia.eu/websitex5.com/v12/v12_comparative_chart_en.pdf

You can set version 12 to reduce stock levels either when an item is purchased, or when it is dispatched.

Kind regards,

Paul