If all permissions to an object are “Allow”, is inheritance important?

Let’s suppose that I am trying to verify the effective permissions for C:\folder based on the fact that the Share permissions are LESS restrictive (more open):

Admin FC not inherited This folder only
Admin FC C:\ This folder, subfolders and files
Users FC not inherited This folder, subfolders and files
Users SP Parent Object This folder and subfolders
Users RX C:\ This folder, subfolders and files
Joe FC Parent object This folder, subfolders and files

FC = Full Control, SP = Special, and RX = Read & Execute. Joe is also member of Users and Admin. What are the effective NTFS permissions for Admin, Users, and Joe?