At this point, however, I think you've wasted far more time - and suffered far more frustration - determining how small a denomination you can give than will be inflicted on the recipient by being handed either assortment of change.
Yes, at this point we've all invested so much into the problem that I think it's reasonable to demand a followup on what happens, but please don't spread your report over more than:
1 sentence must be contained in 1 post,
1 paragraph of text split into no more than 3 posts,
2 paragraphs of text split into 5 posts,
...