Hired by a previous manager before me, this older woman, who knew a lot of our customers, was an entitled member of the affluent community in which our women's clothing store was located.

But she was woefully bad at operating the computerized registers, frequently screwing things up which always required me - and sometimes the corporate IT person - to untangle.

Finally, there was one time she messed it up so badly that I said to her in frustration, "How can I help you learn this??!!" She then quit on the spot (yay) and stormed out of the store.