Where can I find what the cost of a train ticketin the USA was in 1930?

I am looking for the cost of a train ticket in the USA from like New York City to Los Angles for example in 1930. I found it on for an airplane ticket but not a train. Not sure if this Stack Exchange is the right place or not. I have done research online and can not seem to get an answer. The links always takes me to the Amtrak web site which is no good for me.