By the end of the week, GasBuddy analysts say we will be paying a lot more to fill up the gas tank.  A price jump of as much as 45-to-60-cents a gallon is looming according to analyst Patrick DeHaan, and he says the increase will hit Michigan, Indiana, Ohio, and Kentucky.  Michigan's average price today is two-dollars-24-cents a gallon according to GasBuddy, with the lowest prices being in the southwest and southeast corners on the borders with Indiana and Ohio.