EIS - Delete members, have data still roll up to parents

Question

Hello everyone on the forums! I hope everyone reading this is doing well, or at least better than me.
So I've read through all the documentation you can imagine to no avail. I'm running 9.3.1. What I'm trying to do is create an EIS job that has the data of the children of a certain member roll up to their parent without having the children show up in the cube itself.
For example, let's say I have a level one parent 'New York' that has three and only three children: 'Brooklyn,' 'Queens,' and 'Manhattan.' Each child has a value of 100 at the intersections in question.
What I want to do is have New York show up in the cube with the value of 300 for that intersection (one level up) without having the children in the cube. New York would thus become level zero.
I've read that it may be possible via drill-through reporting, but I can't seem to find the right combination of level intersections and/or columns to choose.

Answer 1

The table spells it all out, and I can identify the level 0 members. However, I do not want to filter out all the current level zero members, just the ones that fall under 'New York.'
So, if New York has a sibling, Los Angeles, and Los Angeles has three children, Hollywood, Wilshire, and San Fernando, I still want them to show up in the cube. I only want their cousins at the same level (0) Manhattan, Queens, and Brooklyn removed.
The application for this is to remove old members (products, locations, departments, etc.) that are no longer active, but whose balances are still meaningful for some point in the past. In the example above, this could be because the 'New York' division closed all three of its retail locations, but did not go out of business and might reopen them or relocate these retail locations to the Bronx or Staten Island.
Thank you for taking the time to read my post and respond!