Commodities ended mixed Tuesday as another advance in the dollar pressured some prices. Gold extended its slide, while oil rose after a three-day drop. The gain in oil came even as the dollar advanced. A strengthening greenback often sends oil lower because it becomes more expensive for buyers outside the U.S. The ICE Futures US dollar index, which measures the dollar against a basket of other major currencies, rose 0.3 percent. Even with its recent advance, the dollar is still at its lowest levels in more than a year. Gold for December delivery fell $7.40 to $1,035.40 an ounce on the New York Mercantile Exchange, while December copper futures settled down 1.2 cents to $2.999 a pound. Copper touched a 13-month high of $3.069 on Monday. Oil rose 87 cents to settle at $79.55 per barrel. Oil rose to $82 last week, its highest level in a year. Among metals, December silver dropped 55.5 cents to $16.540 an ounce and October platinum fell $26.80 to $1,312.70 an ounce. In other Nymex trading, heating oil rose 2.16 cents to settle at $2.0551 a gallon. Gasoline for November delivery rose 3.67 cents to end at $2.0705 a gallon. Natural gas for November delivery added 4.4 cents to settle at $4.557 per 1,000 cubic feet. Grain prices slid. December wheat futures dropped 23.75 cents to $5.0325 a bushel at the Chicago Board of Trade. Corn for December delivery lost 7.25 cents to $3.7075 a bushel. January soybeans fell 12.25 cents to $9.7650 a bushel. Prices for cotton, coffee, sugar and cocoa fell. Orange juice and pork bellies rose.

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