Wholesaling giant Costco has reported a 9% jump in US sales to $6bn for the four weeks to 30 May.

Sales for past three quarters rose 10% to $57.17bn. International sales improved even more rapidly, up by 17% in the past month and 21% for the 39-week period.

Inflation in fuel prices and currency exchanges had boosted sales, the wholesaler said.

Meanwhile, Costco has been voted the best place to shop in the US for price, value and shopping experience by Consumer Reports’ annual America’s Top Stores survey, based on the views of more than 30,000 readers.

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