The calculation is based on the total number of cores per environment. The number of cores is based on the number or process runs and level of compute resource required.
Part 1: Cores for Network
Total number of Org Cores:
(Orgs) * (Peers per org) * (Cores per Peer)
Part 2: Cores for Orderer
Total number of Orderer Cores:
(Peers in Orderer) * (Cores per Peer)
Cores for Network + Cores for Orderer