I am trying to filter a hyperblock using a global variable. I can get the hyperblock to visually suppress certain parents or children (based on a multi-selector), but it isn't filtering. For example, if I have a hierarchy with one parent and three children, the user can select the parent and/or the children, or they can select the parent with just one or two of the children. If they select a subset of the children and the parent, the parent shows the GRAND TOTAL for all children, not only the ones selected. Here is a simple mockup of what is happening:
When the user selects the parent and a couple of children, the parent still shows the total:

However, this is the result I want:

Is there a way to filter the results of the hyperblock based on the selected results?