What The Heck Is The Hiring Process For These Cashiers?

I work at a grocery store, and while most of my coworkers are good, some are less bright. After work, I go back in to pick up some food. I walk up to a cashier I know really well.

Cashier: “That’ll be €4,20.”

I hand her €5,20.

Cashier: *Confused* “What am I supposed to do with this?”

Me: “It’s easier. That way I’ll have less change in my wallet.”

Cashier: “No, this is way too difficult.”

She tries to hand me €0,20.

Me: “No, just punch it in and it’ll show you the correct change.”

Cashier: “I don’t know how!”

She’s worked here for at least a month now, and typing in change is one of the first things you’re taught.

Me: “Just type in 520 and press ‘cash.’”

Cashier: *Does so* “Okay, your change is… Wow! €1! How did you know?”

Sometimes, I question humanity.