 Right, this is problem 1.6. If Ms. S. Bell moves from Birmingham, Alabama to State College, how much can she expect her heating bill to increase? Birmingham, Alabama has a heating degree days of 2,800. And State College, PA, has 6,000. We need to remember the 6,000 degree days. Basically, what's happening here is she is going to be heating more her home, and it is increasing from 2,800 to 6,000. So her increase is 6,000 minus 2,800 will be 3,200 degree days. And this increase is how much compared to 2,800 what she has been paying for? So the increase is 3,200 compared to the baseline of 2,800. We need to multiply this by 100 to get the percentage. It would be an increase of 114%. She would be spending about 114% more for her heating in State College, PA.