The United States already handles this just fine. So easily that folks don't really even notice, in fact. Ever notice how gas stations usually give prices out

The United States already handles this just fine. So easily that folks don't really even notice, in fact. Ever notice how gas stations usually give prices out to 1/1000 of a dollar (e.g, $3.459/gal) even though our smallest currency denomination is for only 1/100 of a dollar? It happens with sales tax, too. In Chicago, the tax on a $29.99 video game is $2.924025. We'd just round down to $2.92, and the government lets that odd 0.4025¢ slide. It doesn't really add up, because there's also cases where the tax owed is something like $2.925975 and gets rounded up to $2.93.