This is a good point. It's not widely known, but US gasoline prices are actually in a defined currency unit, the mill (https://en.m.wikipedia.org/wiki/Mill_(cu

This is a good point. It's not widely known, but US gasoline prices are actually in a defined currency unit, the mill (https://en.m.wikipedia.org/wiki/Mill_(currency) https://en.m.wikipedia.org/wiki/Mill_(currency)). For most purposes, using mills as the base unit would be sufficient resolution.