At 5centsCDN, we calculate the price of minutes, to be specific on the number of minutes a client uses the service. The slab starts at 50000 minutes and goes on:
50000 $20 100000 $40 200000 $80 500000 $200 1000000 $400 2000000 $800 which is priced at $0.0004 per minute. The client can get in touch with Sales to get the service activated.