The national average price of a gallon of gasoline hit $4.23, following oil prices upward as supplies from the Middle East remain disrupted. The price of Brent crude, the global benchmark for oil, rose 4 percent, to around $109 a barrel for July delivery. This grade of crude traded at about $72 a barrel just before the war started. West Texas Intermediate crude, the U.S. benchmark, traded... [1771 chars]