Answer:
B) variable
Explanation:
Cellpoint's fixed fee should be the same for all the long distance calls, e.g. $0.15 per call.
Its variable usage rate depends on how long the call lasts, e.g. $0.10 per minute.
For example, a long distance call that lasts 5 minutes would cost (using the costs from the previous examples): fixed fee + variable usage rate = $0.15 + ($0.10 x 5) = $0.15 + $0.50 = $0.65
