Someone

Let's say you have a connection fee of $7.00
A per minute rate of $0.10
You need enough money for the connection fee and 1 minute to make a connection...(have that already)

Lets say your balance is: $10

So:

Balance: $10
Connect Fee: $7.00
Per Minute: $0.10

Formula for figuring out what the timeout on the dial command would be.