Total E&s S-3ASR Automatic shelf registration

Exhibit 12.1

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

	Six Months Ended June  30, 2012		Year Ended December, 31 2011		Year Ended December, 31 2010		Year Ended December, 31 2009			Year Ended December, 31 2008		Year Ended December, 31 2007
Earnings
Income before taxes		156,685		250,320		52,641		(2,816	)		3,206		145
Add-back: Fixed charges		2,603		6,061		18,331		4,956			7,044		5,786
Earnings		159,288		256,381		70,972		2,140			10,250		5,931
Fixed Charges
Interest Expense		1,310		4,228		17,350		4,712			6,913		5,786
Interest in Rent expense		1,293		1,833		981		244			131		—
Fixed charges		2,603		6,061		18,331		4,956			7,044		5,786
Ratio of earnings to fixed charges		61.19		42.30		3.87		0.43			1.46		1.03