Number Format Change in Crosstab for 1 column

Dear Experts,

I am working on CR 2008 SP 7.

I have a cross tab report with expenditures / revenues & FTE. We want to show FTE's in 2 digit decimals but the other numbers will not have any decimals.

The field I am trying to format is a number. Please help me write this formula. Also mention should the formula be added to the display string or against decimals.

Here is what I have and is not working.This is the formula on decimals formatting.

IF {Command.Object Type with Transfers} = "FTE" then totext({Command.dollar},2) ELSE totext({Command.dollar},0)

Error - A number or currency amount is required here.

Thanks

Sunil