The blind can also tell that the sound of them is different for each coin and as for bills, people are more inclined to tell them than to, as what was said to kick the dog. Every blind person that I have usually seen, would have an assistant to help them especially if they are running a business.
I have another question dealing with the blind. Why do they have brail buttons on tv screens (like drive through ATM's)? If they can't see too read the screens, why do they have the brail on the buttons? I'm not asking to be mean, or to make fun. I just think that we as a people don't care enough about the impaired. We say that we have made exceptions for the impaired, but have we?