No problem, if before hand you had negotiated a rate with the railroad
tariff bureau for the shipment of $100.00 dollar bills with a stop privilege
for the conversation to pennies. Your rate with stop privileges would be
published in a tariff and you could have shipped it. Everything that the
railroads hauled was covered by a published tariff rate.
Not knowing anything about tariffs I'm going to assume that the cost would have been for paper and copper? :-)