When you get enough replies regarding this issue, print this out and give it to your boss.
That good idea! I work clothes shop in large shopping center. I often man the cash desk. Most people just pay and say thank you. If ask a question it's always the same. How much? Another size? Do you have this in red ect ect! I can read lips quite well and my speech is very good so most do not realise I am deaf. The odd time I have problem I just ask girl beside me to help. It no big deal. No one ever complain yet.