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 300 minutes and the cost was $103.00. In July she used 670 minutes and the cost was $195.50. 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 247 minutes of calling time in August, how much was her bill? Answer: S