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Average commodity prices and exchange rates for the past three years, which are key drivers of our profit, are summarized in the following table. 

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* Published major supplier selling price in Platts  Metals Week . 

Our revenue and gross profit before depreciation and amortization by business unit are summarized in the following table. 

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* Gross profit before depreciation and amortization is a non-GAAP financial measure. See “Use of Non-GAAP Financial Measures” section for further information. 

