Closing prices for crude oil, gold and other commodities, and foreign exchange levels. : Benchmark U.S. crude oil for August delivery fell $1.48 to $71.65 a barrel Thursday. Brent crude oil for September delivery fell $1.29 to $73.47 a barrel. Wholesale gasoline for August delivery fell 4 cents to $2.25 a gallon. August heating fell 3 cents to $2.11 a gallon. August natural gas fell 5 cents to $3.61 per 1,000 cubic feet. Gold for August delivery rose $4 to $1,829 an ounce.