Sub Project summation - no counting closed project

Hi,

i know that ProjeQtOr is designed to manage project an, so sub-project are part of project and have to be kept in memory even when there are closed.
But grouping sub project into parent project is convenient to for managing organization (ie : i use a parent project for grouping project by family like MCO, DECISIONNEL, OPERATIONNEL, FONCTIONNEL,...).
So, every project is linked to one of this parents projects that help to keep synthetic view.

The problem is : these project show growing budget and charges with time and it is not possible to see what is relevant to closed project and "living" projects.

Is it possible to exclude closed elements from computing ? Even with an option like "consolidate validated work and cost" in activity parameters

Regards,