I'm a cashier and I stil don't know what to do if someone comes to rob me with and tells me to give them all the money in the register. After 10pm, if I am closing, there are no witnesses around because there's barely anyone shopping, the last cashier is usually off at that time, and GSA is probably in electronics/starbucks/etc. closing the registers.
What I would *probably* in this hypothetical situation...
Robber: Give me all of your money, I have a gun.
Me: But is it loaded though?
Jk I'm not that savage
Actually Me: Would you like fries with that?
Jk I'm not that funny
Seriously Me: *Takes everything out of the drawer including fake coupons.*
Robber: Is that all?
Me: Yes, have a nice day.