clickable total in a list

[algae]

Have recently started using Active Reports and am having trouble connecting two lists. Product A and Product B are clickable regions in the list and they successfully filter the second list. But I need to add a total (Product A + Product B) which is also clickable and can filter the second list too.

I know I can achieve essentially the same thing with a data drop-down list but I particularly want to use a list so that I can customise the style of each list cell.

thanks