Cheated in the Mexican Bank

You will learn untill you will die – my grandpa was saing me… Maybe I trust people too much…
I had some euros left from Germany. Yes, I know that Mexico is The Kingdom of Dollar, but I spent too much money for the Barranca train I wanted to supply my budget. I went to the bank in Los Mochis. Sorry, zero English there.
I showed my euros and asked for the rate. 19.04 – she wrote. OK. She was smiling, she printed something, took a copy of my passport and paid me pesos. The receipt was small and not clear, but I did not think I must came to the BANK with my own calculator… In the evening I recognized that they apply the dollar rate -12,56, not much higher euro rate.
Sorry, no time to go back to the bank – I have my ferry to Baja California tonight…
But the Silver City of Alamos – 3 hours by bus from Mochis was very interesting to see…
Do not cry, my Friends – it was not a big amount of money…