I once saw someone start making change for a $20 when I had paid with a $10. I advised her as much and she thanked me and adjusted. I never actually got the c

I once saw someone start making change for a $20 when I had paid with a $10. I advised her as much and she thanked me and adjusted. I never actually got the change, so my literal answer is "not so far", but my practical answer is "it happens".