This morning I stood down the third attempt to short change me in Puerto Peñasco. This time it was at the Ley Express, and it was identical to a scheme at Super Ley a couple of months ago. This time I was rung up for 38 pesos of fresh vegetables. i gave the teller a 200 peso note. She feigned having to get change, took the note off to the manager. Came back two minutes later and continued to ignore me while she rang up another customer. Eventually a confederate arrived and laid 62 pesos in front of me. I started complaining loudly in English and a 100 peso note was added to the change. Another time at the Pemex by the windmills I gave the attendant 500 pesos for gasoline. When she removed the nozzle I looked back at the pump and it had dispensed exactly 480 pesos worth.