I bought a frozen pizza once that was labeled "22.05 OZ (625 g)". I really
don't think they were trying to make it 625 g exactly. They just made the
pizza how they thought best and labeled it the way they always have. People
don't really care whether a package says 454 g or 450 g. They usually look
at the per-unit cost on the shelf tag, if anything.
I don't think in many cases they look at all. They just take the "big box" or the "small box" or the "medium-sized bottle" from the shelf, based on what they think they need. So the SI can be rational and, if proclaimed on the box, this will help things along, as it did with 2 L soda.
Carleton
