Calulated Fields

I have a document which is connected to dynamics crm

I have this field:

{{#A=!Anrechnungs Menge_es_:signer1:text field}}

which is working when i use the short reference

{{$A           }}€

to this point everthing is fine

so now i would like to have different values depending what the Field $A have

i tried this:

{{price_es_:signer1:calc(if($A=’5000’,19.99))}}

which is not working. any ideas?