Which preposition to use with kopek

on Occurrences 5%

Then we'll write out a statement that such and such notes are due, and that we'll pay twenty-five kopeks on the ruble:

at Occurrences 2%

I began to go about the town as a buffoon, to get money, a kopek at a time, to make a fool of myself, to tell funny stories, and play all sorts of tricks.

in Occurrences 2%

But won't they take eight kopeks in five years? BOLSHÓV.

of Occurrences 2%

You see, we're trading and trading, my boy, but there's not a kopek of profit in it.

per Occurrences 1%

Tobacco is also grown in small quantities in parts of Georgia and made into cigarettes, which are sold in Tiflis at three kopeks per hundred.

Which preposition to use with  kopek