.8 million , $ 442.9 million and $ 398.0 million for the years 2012 , 2011 and 2010 , respectively . cash and cash equivalents cash and cash equivalents include cash and market- able securities with original maturities of less than 90 days . inventories inventories consist of provisions , supplies and fuel carried at the lower of cost ( weighted-average ) or market . property and equipment property and equipment are stated at cost less accu- mulated depreciation and amortization