What does the result separate?
Seven kinds of thing that are usually blurred together: what a licence you hold already includes; a prerequisite licence that must be there first; a user add-on for each person; capacity bought for a tenant, an environment or a machine; a licence on a resource account such as a shared mailbox or a call queue; an external telecom contract; and a consumption cost billed by use. Settings and migrations are listed apart, and never as something to buy.