Exhibit 12

Calculation of Ratio of Earnings to Fixed Charges
(in thousands)

												Nine Months Ended
	Years Ended July 31,											April 30,
	1999		2000			2001		2002		2003		2003		2004
Earnings
Income before cumulative effect of change in accounting principle	$	61,271	$	60,507		$	34,206	$	12,878	$	12,392	$	6,720	$	11,378
Income tax provision		29,745		35,536			20,091		6,343		2,635		3,162		6,484
Earnings		91,016		96,043			54,297		19,221		15,027		9,882		17,862
Fixed Charges
Interest expense		1,772		21,169			22,195		16,255		27,985		18,340		28,824
Portion of rental expense representative of interest factor		705		1,113			2,082		3,030		3,034		1,950		2,439
Fixed charges		2,477		22,282			24,277		19,285		31,019		20,290		31,263
Capitalized interest		—		(580	)		—		—		—		—		—
Earnings before income tax provision and fixed charges	$	93,493	$	117,745		$	78,574	$	38,506	$	46,046	$	30,172	$	49,125
Ratio of earnings to fixed charges		37.7x		5.3x			3.2x		2.0x		1.5x		1.5x		1.6x