I think rounding to the nearest dime might make sense, who wants those heavy and annoying nickels? We’ve got about 50 pounds of change in our house from over the years lol. Where we live though cash is still an important part of the economy. It’s what allows many small businesses to survive, if they are smart enough to only count a fraction of their cash sales. What will be a turning point in the mentality of the region is if an iconic Italian pastry bakery stops saying cash only. They’ve been that way for decades, if they accept other payments it will be a huge culture shock, honestly.
indeed it does make way more sense to round to a base 10 division.