For an outbound team, the licence is the smaller number
Sales teams that live on the phone routinely spend more on minutes, numbers and recording storage than on CRM seats, yet the seat rate is what gets compared. If your reps make eighty dials a day, the telephony line dominates the budget, and a small difference in per-minute rate or connect rate matters more than a large difference in licence price.
Four numbers give you the model
Dials per rep per day, connect rate, average talk time on connected calls, and selling days per month. Multiply those out and you have monthly talk minutes. Ask whether ringing time is billed, then apply the per-minute rate for every market you dial. Now the rate card means something.