I have a similar situation. What I would like to do is to suppress the group and the data.
The condition is, if the group DOES NOT start with letter "P", suppress the groups and their data. I would like to show only the groups that start with letter "P", with their data. I used the left function, 1 = "P". It seems to work on the group, but not the data.
I think I have to do something at the formula level. I am unsure whether to do it at the details or at the group.
I do appreciate your response. Thank you.