Read the website, use the tool. A single line on Do more or play more is $80. A second line reduces both lines to $70.
If you added a line mid bill cycle, you're going to have prorated charges for the partial month.
FayeD, your business is important to us, and we would never want to see you go! Knowing the correct cost of the line of service is essential. What plan do you have? Did you receive the first bill?