Crystal Report 2008 - How to eliminate thousands separator by formula?

Hi everybody,

I am working on Crystal Report 2008.

I have a formula called 'GroupingOrder' and it reads :

TOTEXT ({usp_01.U_LineNumber},0)

U_LineNumber is a number, and the above formula removes the 0's after the decimal.

In Group Expert, I chose to group by the above formula.

NOW I RUN MY CRYSTAL REPORT

I click the Toggle Group Tree button near the top.

I see all the Line Numbers listed as follows:

1,125

1,126

1,127

1,128

1,129

...etc

I would prefer to see the Line Numbers listed without the thousands separator, like:

1125

1126

1127

1128

1129

My Question:

How can I modify my formula to get rid of the comma?

Thanks

Leon Lai