Hi Inka:
Using the standard 56A Product Type( and without assingining the product type/CoCo to any Field Selection Definition nor flagging the tabstrip 70 in tx. GFTR_C0102), when creating the facility you should be able to add the charges as you mention(the charges tab should appear by default - Product Category 560 standard configuration). Please see example screenshoot below:
Kind Regards
Ignacio