Költségtke
Költségtke is a term that appears to be a misspelling or a non-standard word in the Hungarian language. A direct translation of the component parts "költség" and "tke" does not yield a recognized Hungarian word or phrase.
"Költség" in Hungarian means "cost" or "expense." The suffix "tke" does not form a standard grammatical ending
It is possible that "költségtke" is a typographical error, a neologism specific to a very small group