I don't know - its very easy to buy what looks like the same jar and find it has less. The consumer should not be expected to be some fucking food detective, constantly working to make sure that they aren't being ripped off. Packaging should be simple enough that the volume presented to the purchaser is the actual volume.
Literally no reason to allow companies to use misleading package sizes or to expect customers to check the unit price every time they walk into the grocery store. Its great the unit prices are there, but misleading packaging still sucks.
