Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges

|  | Fiscal Years Ended June 30, |
|  | 2012 |  |  | 2011 |  |  | 2010 |  |  | 2009 |  |  | 2008 |
|  | ($ in millions) |
Earnings: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Add: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings from continuing operations before income taxes |  | $ | 200.9 |  |  | $ | 269.7 |  |  | $ | 342.1 |  |  | $ | 346.0 |  |  | $ | 319.7 |
Fixed charges |  |  | 28.4 |  |  |  | 25.7 |  |  |  | 24.1 |  |  |  | 26.8 |  |  |  | 44.0 |
Amortization of capitalized interest |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Distributed income from equity investees |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Share of pre-tax losses of equity investees for which charges arising from guarantees are included in fixed charges |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest capitalized |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Preference security dividend requirements of consolidated subsidiaries |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
The minority interest in the pre-tax income/(loss) of subsidiaries that have not incurred fixed charges(2) |  |  | (0.7 | ) |  |  | (0.2 | ) |  |  | 1.0 |  |  |  | 2.5 |  |  |  | (0.2 | )
Total |  | $ | 230.0 |  |  | $ | 295.6 |  |  | $ | 365.2 |  |  | $ | 370.3 |  |  | $ | 363.9 |
Fixed charges: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  | $ | 14.0 |  |  | $ | 9.9 |  |  | $ | 9.8 |  |  | $ | 14.3 |  |  | $ | 31.3 |
Amortized premiums, discounts and capitalized expenses related to indebtedness |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Estimate of the interest within rental expense(1) |  |  | 14.4 |  |  |  | 15.8 |  |  |  | 14.3 |  |  |  | 12.5 |  |  |  | 12.7 |
Preference security dividend requirements of consolidated subsidiaries |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 28.4 |  |  | $ | 25.7 |  |  | $ | 24.1 |  |  | $ | 26.8 |  |  | $ | 44.0 |
Ratio of Earnings to Fixed Charges |  |  | 8.1 |  |  |  | 11.5 |  |  |  | 15.2 |  |  |  | 13.8 |  |  |  | 8.3 |

(1) | One-third of rental expense under operating leases is assumed to be the equivalent of interest.

(2) | Represents the Company’s share of gains/(losses) from its joint venture with the Tokyo Stock Exchange.