The wally world post made me think about jelly pricing. Next time you are in the jelly department of your local store check out the price of grape jelly. The large size is usually priced as cheap and often cheaper than the small size. Same brand...Welch's or Smucker's both. Compare large and small of either brand. Been this way for years. Just odd to see small for 2.89 and large for 2.79. Only explanation is that it must be harder to get the jelly in those little jars.
Also, sardines are packed tightly in the can because the oil that takes up the remaining too is more expensive than the sardines.