As at 30 September 2008, the Cost of Capital Report uses the following input assumptions:
Risk free rate of return (five year bond)
| Rf |
|
Marginal tax rate on debt
| Tc | 30.0% |
|
| Rm- DmTm-Rf (1-Ti ) | 7.5% |
Investor tax rate on equity
| Ti | 30.0% |
Minimum asset beta adjustment
|  | 0.30 |
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