#American oil
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North American oil prices vary on July 12
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Average cost of American crude oil slightly increases on July 10
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North American oil prices remain unchanged on June 25
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North American oil prices up June 14
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North American oil prices for past week
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North American oil prices slightly go down on June 8
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North American oil prices go up on June 7
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North American oil prices go down on June 6
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North American oil prices for May 14-18
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Average price of North American oil on May 1
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North American oil prices increase
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North American oil prices down on Jan. 3