| Three Months Ended April 30, | ||||||||
| 2009 | 2010 | |||||||
| Income before income taxes | $ | 18,016 | $ | 9,017 | ||||
| Fixed charges | 8,515 | 9,021 | ||||||
| Capitalized interest | (18 | ) | (12 | ) | ||||
| Total earnings | $ | 26,513 | $ | 18,026 | ||||
| Interest expense (including capitalized interest) | $ | 5,022 | $ | 4,796 | ||||
| Amortized premiums and expenses | 350 | 998 | ||||||
| Estimated interest within rent expense | 3,143 | 3,227 | ||||||
| Total fixed charges | $ | 8,515 | $ | 9,021 | ||||
| Ratio of earnings to fixed charges | 3.11 | 2.00 | ||||||
