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## 10. Supplemental Information 

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## 11. Inventories 

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Cost of sales of $7.3 billion (2011 – $6.6 billion) include $7.1 billion (2011 - $6.3 billion) of inventories recognized as an expense during the period. 

Total inventories held at net realizable value amounted to $88 million at December 31, 2012 (2011 - $237 million). Total inventory write-downs were $21 million (2011 - $38 million) during the period and were included as part of cost of sales. 

Long-term inventories consist of ore stockpiles and other in-process materials that are not planned to be processed within one year. 

