It may not be a law here in the US, but most stores do it anyway. Meijer, Kroger, Walmart all have per-unit prices in a corner of the tag. Most of the time, sal

It may not be a law here in the US, but most stores do it anyway. Meijer, Kroger, Walmart all have per-unit prices in a corner of the tag. Most of the time, sale prices have them too.