In Hong Kong, it’s very common to see mainlanders come over and buy very expensive things–all in cash. So the Hong Kong apple store needs a bill counter at the register.
They avoid the luxury tax of the mainland, which can be as much as 50%, and in some instances the money may not be entirely legit (i.e. bribes) so buying handbags or computers is a good way to spend it.
Apple even has bill counters for people who buy laptops with cash. I’ve heard of smaller retailers employing a person full-time to be on hand to count wads of cash. And, lastly, cash is still king here; it just isn’t as much of a credit card / ATM card economy. Pretty crazy huh?