Gas prices are slowly falling....the average price of gasoline across South Central Ohio is six cents lower this week at $3.90 per gallon, according to AAA East Central’s Gas Price Report. This week’s average price in Washington Court House: is $3.79, in Hillsboro $3.58, and in Chillicothe the price for regular unleaded stands at average of $3.88 per-gallon. Domestically, the national average for a gallon of gas has fallen to $4.11. This is seven cents less than a week ago, 22 cents less than a month ago, and $1.25 more than a year ago. The cost of gasoline has continued to slide due to falling oil prices.