"Basic cashier knowledge they should be teaching you on day one." About 10ish years ago I had an idea for a product that would essentially provide online train

"Basic cashier knowledge they should be teaching you on day one." About 10ish years ago I had an idea for a product that would essentially provide online training on this for cashiers. Back then I thought 'but everything is moving to cashless payments, plus more and more registers calculate change, no need for this". I wonder sometimes if this was The One That Got Away for me...