Jane has a pre-paid cell phone with A Fee and Fee. She can't remember the exact costs, but her plan has a monthly fee and a charge for each minute of calling time. In June she used 180 minutes and the cost was $121.00. In July she used 970 minutes and the cost was $476.50. A) Express the monthly cost C as a function of a, the number of minutes of calling time she used. Answer: B) If Jane used 630 minutes of calling time in August, how much was her bill? Answer: S Make sure you include C(x) in your answer for Part A