Zoho Books "Credit Note Template"

Zoho Books "Credit Note Template"

In the email settings for the "credit note email template", the field   %CN_Total%   is displayed like this:
USD344.55

I need it displayed like "USD $344.55"  or simply  "USD 344.55".


If "USD" and "344.55" are concatenated together without any space in between, it's very hard for my auditing.