Choosing a phone plan in a college dormitory, each student has a choice of two phone companies. Company A charges $7.46 per month plus 13 cents a call and Company B charges $6.17 per month plus 17 cents per call.
Company A - $7.46 per month + 13 cents
Company B - $6.17 per month + 17 cents
About how many phone calls do you make per month?