I ran across an interesting article, "Scratch That," on Slate. The author did a cost/benefit analysis to find out if making bagels, yogurt, cream cheese, jam, crackers and granola is cheaper than buying from a store, and if it's worth it to do so.
Sentence of TMI note in the article: "Obviously, homemade bread tastes better than Wonder, but does playing Martha Stewart really save you money?"
For some items, yes! Baking from scratch can save you a tremendous amount of money, making the time and trouble well worth the effort. Plus, the results are almost always better than what you can buy in the store.
The author includes her results, as well as links to her favorite recipes. Check out the article here.