Oh and chatty Cathy cell phone plan she pays four minutes used plus a fixed monthly charge for 500 minutes she pays $35 total and for 1500 minutes used she pays $55 total
so is it saying what is the monthly fixation charge ? if it is the answer would be if it's 500 minutes for $5 so fixed cost would be $30 cost = $30 + $5 * the number of mins divided by 500 Hope this helps
