8.8lbs. @ $10.79 = 1.23
18.5lbs @ $13.59 = .73
42lbs @$34.49 = .82
As you can see this brand of dog food did not follow the logic of larger is cheaper. The large 42-pound bag actually costs more per unit than the mid-size bag. I believe in many instances the smaller size costs more per unit because it is a convenience size. Many times people want to just grab a small size and be on their way. They can use it and be done with it. Much like the reason prices at convenience stores are higher. You pay for the convenience.
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