Exhibit 12.1
RATIO OF EARNINGS TO FIXED CHARGES
Nine Months Ended February 28, | Year Ended May 31, | |||||||||||||||||||||||||||
2010 | 2009 | 2009 | 2008 | 2007 | 2006 | 2005 | ||||||||||||||||||||||
Income before income taxes | $ | 78,723 | $ | 20,930 | $ | 44,398 | $ | 40,154 | $ | 6,014 | $ | 20,055 | $ | 12,040 | ||||||||||||||
Plus fixed charges: | ||||||||||||||||||||||||||||
Interest expense | 1,270 | 1,361 | 1,692 | 296 | 272 | 184 | 114 | |||||||||||||||||||||
Debt cost amortization | 429 | 289 | 470 | — | — | — | — | |||||||||||||||||||||
Portion of rents representative of an appropriate interest factor | 2,589 | 2,467 | 3,295 | 2,990 | 3,379 | 3,007 | 2,729 | |||||||||||||||||||||
Total fixed charges (1) | $ | 4,288 | $ | 4,117 | $ | 5,457 | $ | 3,286 | $ | 3,651 | $ | 3,191 | $ | 2,843 | ||||||||||||||
Adjusted earnings (2) | $ | 83,011 | $ | 25,047 | $ | 49,855 | $ | 43,440 | $ | 9,665 | $ | 23,246 | $ | 14,883 | ||||||||||||||
Ratio (2 divided by 1) | 19.4 | 6.1 | 9.1 | 13.2 | 2.6 | 7.3 | 5.2 | |||||||||||||||||||||
Fixed charges deficiency | $ | — | $ | — | $ | — | $ | — | $ | — | $ | — | $ | — | ||||||||||||||
Rent Expense | $ | 7,775 | $ | 7,407 | $ | 9,895 | $ | 8,980 | $ | 10,148 | $ | 9,031 | $ | 8,194 | ||||||||||||||
Interest Factor at 33.3% | 33.3 | % | 33.3 | % | 33.3 | % | 33.3 | % | 33.3 | % | 33.3 | % | 33.3 | % | ||||||||||||||
Portion of rents representative of an appropriate interest factor | $ | 2,589 | $ | 2,467 | $ | 3,295 | $ | 2,990 | $ | 3,379 | $ | 3,007 | $ | 2,729 |