Suzie is trying to decide which of two cell-phone plans is b…

Suzie is trying to decide which of two cell-phone plans is best for her.  Company ‘A’ charges $40 per month and $0.05 per text message.  Company ‘B’ charges no monthly fee but it is $0.10 per text message.  Please give Suzie advice and back it up with some math. Your solution in this story will not necessarily require you to define variables and state the solution. You state at what point one plan becomes better than the other.