If you are selling in the German marketplace and not participating in the Central European Programme, there is a CEP fee setting in the Amazon Specific section of SAS's Settings which adjusts the Fulfilment Fee (FBA Fee) accordingly in the Profit Calculator:
So, if you are not participating in the CEP and toggle the 'Enabled CEP Storage' option off, your Fulfilment Fee will have the €0.26 surcharge added to it...whilst toggling the 'Enabled CEP Storage' option on will remove the €0.26 surcharge - note the prompt differences above Fulfilment (FBA) when these options are toggled.