Delaware and North Dakota Have Identical State Gasoline Taxes of 23.0

Essay

Delaware and North Dakota have identical state gasoline taxes of 23.0 cents per gallon. When added to the federal gasoline tax of 18.4 cents per gallon, the total tax on one gallon of gasoline in these two states is 41.4 cents. On October 8, 2013, the average price of one gallon of regular gasoline was $3.309 in Delaware and $3.394 in North Dakota. Briefly explain whether this is an example of price discrimination. Assume that the gasoline being sold is identical in both states.
Sources: gaspricewatch.com and gasbuddy.com.