SOLE TRADER registration (Sofia)

hi i need to register as a sole trader and can only found pay services from uk and else where as various fees , but i would like to know any information of how should i do it and how much that will cost me without the register a company business online ,mean factually how much should it be to register as a sole tradr in bulgaria and how it is done ? and where to go
many thank any one who want to help
ps : i don't speak bulgarian :( sorry
is realtively urgent as i have just become distibutor of a brand for bulgaria and i plan to start soon

Ctesse de l'orme