(Radio Iowa)  – Triple A shows the statewide average price for a gallon of regular unleaded in Iowa is three-36 ($3.36). That’s 20 cents lower than the national average and more than a dollar-30 ($1.30) lower than a year ago. The cheapest gas is in Henry County, where Triple A found it for sale at three-11 ($3.11) a gallon on Thursday. The most expensive fuel prices in the state were in Winneshiek County, where Triple A shows regular unleaded was selling for three-51 a gallon yesterday (Thursday).