Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges



|                                                            |  |                          |        |      |   |        |  |   |        |     |      |   |        |  |   |       
|----------------------------------------------------------- |  | ------------------------ | ------ | ---- | - | ------ |  | - | ------ | --- | ---- | - | ------ |  | - | ------
|                                                            |  | Years Ended December 31,
|(in thousands, except ratio of earnings to fixed charges)   |  | 2003                     |        | 2004 |   | 2005   |  |   | 2006   |     | 2007
|Income (loss) from continuing operationsbefore income taxes |  | $                        | 34,776 |      | $ | 21,311 |  | $ | (4,469 | )   |      | $ | 41,531 |  | $ | 22,209
|Fixed charges:                                              |  |                          |        |      |   |        |  |   |        |     |      |   |        |  |   |       
|Interest expense (including capitalizedinterest)            |  |                          | 2,886  |      |   | 5,632  |  |   | 5,010  |     |      |   | 5,028  |  |   | 5,012 
|Interest relating to rental expense(1)                      |  |                          | 2,141  |      |   | 2,584  |  |   | 4,079  |     |      |   | 5,790  |  |   | 6,339 
|                                                            |  |                          |        |      |   |        |  |   |        |     |      |   |        |  |   |       
|Total fixed charges                                         |  |                          | 5,027  |      |   | 8,216  |  |   | 9,089  |     |      |   | 10,818 |  |   | 11,351
|                                                            |  |                          |        |      |   |        |  |   |        |     |      |   |        |  |   |       
|Earnings available for fixed charges                        |  | $                        | 39,803 |      | $ | 29,527 |  | $ | 4,620  |     |      | $ | 52,349 |  | $ | 33,560
|                                                            |  |                          |        |      |   |        |  |   |        |     |      |   |        |  |   |       
|Ratio of earnings to fixed charges                          |  |                          | 7.92   |      |   | 3.59   |  |   | N/A    | (2) |      |   | 4.84   |  |   | 2.96  
|                                                            |  |                          |        |      |   |        |  |   |        |     |      |   |        |  |   |       



|(1) | The representative interest portion of rental expense was deemed to be one-third of all rental expense, except for the
rental expense related to the off-balance sheet financing leases, as described in the footnotes to the financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2007 which was deemed to be all interest.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | For the year ended December 31, 2005 our earnings were insufficient to cover fixed charges; the amount of
additional earnings needed to cover fixed charges for the year was $4.5 million.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------