Traveling on a train together

A Jew and a non-Jew are traveling on a train together when suddenly the goy asks "Why are you Jews so smart?"
The Jew is quiet for a moment and then says "its because of all the herring we eat."
A few hours later the Jew takes out some herring and starts to eat it.
The goy asks "how much herring do you have?" and the Jew answers "a dozen pieces".
"And how much do you want for a piece?"
"20 kopecks" (a lot of money).
The man hands the money over and the Jew gives him a piece of herring.
"He takes a bite and says suddenly "I could have bought this same herring in Moscow for a few kopecks".
To this the Jew responds "see... your getting smarter already."

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