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St. Paul, Minn.

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A rice vendor in China calculates prices of rice
A rice vendor uses a calculator with customers standing around at the Zhenxin Grain Wholesale Market April 17, 2008 in Shanghai, China. According to the National Development and Reform Commission, China is set to raise the minimum purchase prices of rice and wheat for the second time this year as global grain prices hit the highest in two decades.
Photo by China Photos/Getty Images
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A rice vendor in China calculates prices of rice
A rice vendor uses a calculator with customers standing around at the Zhenxin Grain Wholesale Market April 17, 2008 in Shanghai, China. According to the National Development and Reform Commission, China is set to raise the minimum purchase prices of rice and wheat for the second time this year as global grain prices hit the highest in two decades.
Photo by China Photos/Getty Images