Coin scales will solve the issue once and for all, because they have reached such a level of technical excellence that they can tackle the counting operation without error. It is the exact twin of the traditional not counter that we see in virtually every store we go, but it is fitted with special features. They enable the user to calibrate the coin scoop and will instantly recognize denominations even if the coins are packaged.
It is simply amazing that such a device existed for so long, and the coin scales are not spread all over the world by now. The truth is that these products went under the radar for a while and people forgot about them, but the ones who run a small business are making full use of it. Some of the most advanced coin scales will not only get the exact number of domestic coins but will have no problems in accepting foreign currencies as well. While this might not look like much, in tourist cities, it is an important perk.