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Consumer spending in the United States advanced a robust 0.8% in June as shoppers took to auto showrooms to enjoy sales incentives that helped keep inflation in check, a government report showed Tuesday. Incomes in June rose 0.5%, the Commerce Department said, a touch stronger than the 0.4% gain analysts on Wall Street had expected. The increase in spending, which was already reflected in a report on second-quarter economic growth released Friday, was as expected. Taking into account the bite from taxes, consumer income was still up 0.5%.