I don’t quite see how pointing out to the cashier that you’re being overcharged makes someone neurodivergent. I catch wrong prices all the time and say in a friendly tone “hey can I just get you to double check that, I though I saw it was $x.” If they then say to take it up with customer service thats fine, I don’t press it, but pointing it out as soon as you notice is the best response and in many smaller stores there is no one else to deal with.