EPBCS Security to see Total Financials without seeing Granular details

Summary:

Hi Experts,

We have some of our grocery stores being divested. Our C-Suite still needs to be able to see Total Financials in aggregate for the entire company, however, we need to restrict their access from being able to see granular detail for divested stores. In our current state we have a Store Dimension with security set on each store (member) in the hierarchy and then a group associated with each store to give read/write access. For non-divested stores, C-Suite will be able to maintain seeing store level detail. Looking for recommendations on how modify/enhance security to accommodate for this without having