Exhibit 12.1

Calculation of Ratio of Earnings to Fixed Charges

	Year ended December 31,											Nine months ended Sept.  28,
	2007		2008		2009			2010		2011		2012
Fixed Charges
Interest expense	$	2,085	$	2,264	$	1,304		$	2,661	$	2,812	$	2,408
Interest capitalized		378		370		112			31		48		141
Interest portion of rent		2,626		2,517		2,792			3,290		2,959		2,079
Total fixed charges		5,089		5,151		4,208			5,982		5,819		4,628
Earnings
add:
Pretax income		82,705		26,076		(20,784	)		70,968		54,266		33,421
Amortization of capitalized interest		567		595		517			499		441		450
less:
Interest capitalized		378		370		112			31		48		141
Total earnings	$	82,894	$	26,301	$	(20,379	)	$	71,436	$	54,659	$	33,730
Ratio		16.29		5.11		—			11.94		9.39		7.29

Total earnings were insufficient to cover the fixed charges for 2009 by $24.6 million primarily due to operating losses. Accordingly, such ratio is not presented for the year ended December 31, 2009.

Fixed charges are equal to interest expense (including amortization of deferred financing costs), plus the portion of rent expense estimated to represent interest.