Hi,
you may get away with
format|Cells|number and select the paren option from the dropdown.
If negative brackets are not available then it's over to Windows
Start>Settings>Control Panel>Regional and Language Settings>Regional
Options>Customize>Currency>Negative Currency Format. Click on drop-down
arrow
and select the ($1.1)
Repeat the above for number and it should then be in the Excel format dialog
Mike