Is this for a module? Can you provide a reference?

The file that you seem to be looking at it part of the DNN Platform. It's not recommended that you modify core files.

If you are looking to remove a symbol, it might be best to do this with CSS. But, to tell you more, I'd need to know what you are looking at?

Yes, I was referring to a core DNN module that no longer works with PayPal. Specifically the problem is the code currently uses these variables to pass as the subscription amounts, and they include currency symbols, which no longer is allowed per paypal. As such, I had to add the .Replace("$", String.Empty) to remove the currency symbol (well actually I guess I should just remove the enFormat formatting in case I have non-US signups...but anyway...

Dim strService As String = String.Format(enFormat.NumberFormat, "{0:#####0.00}", objRole.ServiceFee).Replace("$", String.Empty)
Dim strTrial As String = String.Format(enFormat.NumberFormat, "{0:#####0.00}", objRole.TrialFee).Replace("$", String.Empty)

And the amount in the URL is being set to the strService string, which includes the currency symbol

strPayPalURL += "&a1=" & HTTPPOSTEncode(strTrial)
strPayPalURL += "&a3=" & HTTPPOSTEncode(strService)

But I found that I did change the DNN core file to wire up to my own copy of the file that is in my custom module. Which I do have the ability to rebuild and deploy to our DNN 6.1.3 site:

<%@ Page language="vb" AutoEventWireup="false" Explicit="True" Inherits="MyCompany.Modules.MyModule.PayPalSubscription" CodeBehind="PayPalSubscription.aspx.vb" %>

Which I did, and am all set now. This was a very old custom module that I haven't worked on in years, so I had to find my way around again :)

Great!