 The average price of gasoline in North Dakota rose nearly 10 cents a gallon last week. That's according to GasBuddy.com. They say the average price is now $3.29. That's a nickel higher than a month ago, but 16 cents lower than a year ago. GasBuddy says the demand for gasoline over the Fourth of July holiday, plus the $80 per barrel oil price, could mean slight increases.