Exhibit 12.1

	For the Year Ended May 31,										Three Months Ended August 31,
	2008		2007		2006		2005		2004		2008
	(In Thousands Except Per Share Data and Ratios)										(unaudited)
Earnings Available for Fixed Charges
Earnings before income taxes	$	115,163	$	86,364	$	45,717	$	16,917	$	1,706	$	28,063
Add:
Interest expense	18,893		15,432		17,115		15,666		15,666		3,926
Amortization of capitalized interest	—		—		85		85		85		—
Amortization of debt expense	1,686		1,269		804		1,166		1,024		747
One-third of rent expense under operating leases (estimated by management to be the interest factor of such rent expense)	7,239		5,961		4,684		4,025		3,748		2,102
Earnings available for fixed charges	$	142,981	$	109,026	$	68,405	$	37,859	$	22,229	$	34,838
Fixed Charges
Interest expense	18,893		15,432		$	17,115	$	15,666	$	15,666	$	3,926
Amortization of capitalized interest	—		—		85		85		85		—
Amortization of debt expense	1,686		1,269		804		1,166		1,024		747
One-third of rent expense under operating leases (estimated by management to be the interest factor of such rent expense)	7,239		5,961		4,684		4,025		3,748		2,102
Total fixed charges	$	27,818	$	22,662	$	22,688	$	20,942	$	20,523	$	6,775
Ratio of earnings to fixed charges	5.1		4.8		3.0		1.8		1.1		5.1