Inventories (Tables)

12 Months Ended

Dec. 31, 2011

Our inventory amounts by product type were as follows at the dates indicated:

	December 31,
	2011		2010
NGLs	$	563.6	$	548.3
Petrochemicals and refined products		443.4		399.7
Crude oil		39.2		121.1
Natural gas		65.5		64.7
Other		--		0.2
Total	$	1,111.7	$	1,134.0

The following table summarizes our cost of sales and lower of cost or market adjustments for the periods presented:

	For Year Ended December 31,
	2011		2010		2009
Cost of sales (1)	$	38,292.6	$	28,761.6	$	20,921.8
Lower of cost or market adjustments		9.5		7.9		6.3
(1) Cost of sales is a component of “Operating costs and expenses,” as presented on our Statements of Consolidated Operations. Year-to-year fluctuations in these amounts are primarily due to changes in energy commodity prices and sales volumes associated with our marketing activities.