UNDATED (KDAL) - The average gasoline price in Minnesota for unleaded regular is now 3.36 a gallon, over 30 cents a gallon higher than three weeks ago.  The U-S average is at 3.37 a gallon.  Duluth stations have prices ranging from 3.29 to 3.45 and in Superior the range is 3.35 to 3.45 a gallon.  Reasons for the increase include a spike in crude oil prices and some refineries that continue to have repair issues.  Gail Weinholzer from Triple-A Minnesota says prices may fall back some once all refineries are up and running again.