Prices at the gas pump slip again going into the Fourth of July weekend. Triple-A says the average in Portland for regular is down another penny to $3.75 a gallon. That's nearly a nickel below the average of a week ago and almost 12 cents a gallon cheaper than at this point in June. The Oregon average for regular is about $3.77 a gallon. It’s also pretty close to that price in the Bend area.