Aphone company charges a base fee of $10.00 per month

Not sure what the question is but ill try an explain. $10.00 a month means $1200.00 a year. if you ever need to find out the amount it will cost for x months then this is the equation      M = $10(x)    M is the total amount it costs, 10 is the 10 dollars you pay every month and (x) is how many months. so lets say you need to know how much it will cost for 3 months, then all you do is plug 3 into the x's spot and solve the equation. Hope this helps! Need anything else just ask!