Washington state averages $4.42 per gallon of 87-octane unleaded; National average now $4.06 for a gallon By Bill Helm [email protected] FERNDALE — On Monday, March 7, GasBuddy reported that the average gasoline price in Washington is $4.42 per gallon, an increase of 44.3 cents in the past week. That figure is according to GasBuddy’s survey of…