| http://www.w3.org/ns/prov#value | - Sales quantities for the quarter were lower than production particularly in copper resulting in an increase in inventory at the end of the quarter which will positively impact earnings in the second quarter.Adjusted Earnings were $152 million or $0.21 per share, an increase of 110%, in the first quarter of 2011 compared with $75.9 million or $0.10 per share in the same quarter of 2010.Net earnings
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