I'm thinking of volunteering but my only gripe is the till. The last time I did this, you had to work out the change, the till didn't do it for you. I know I sound like a baby but I don't want to make a mistake and get irrate customers who then flummox me further. This happened to me in the past and I felt mortified. I've had a peek at the local charity shops and they still use really really old tills. Any reassurance would be great.😬