My brain has come up with some numbers I must have learnt many years ago.
The certification requirements of the airflow into the cabin of a commercial airliner are :- 1 pound (mass) of air per minute per occupant in normal operation, and
0.5 pound of air per minute per occupant in standby/emergency operation.
On the BAC 1-11 this gave a flow of 60 pounds per minute for each pack. (Although the maximum occupancy was 125)
The current certification requirements may not be the same though.
Hope this helps.