In the winter, I shop at 2 stores: a local natural foods store where I buy produce, cheese, grains, beans, oils, yeast and other staples. Then I go to a mainstream supermarket (Harris Teeter)for things like frozen bagels, cereal, etc. I also make a special trip to Whole Foods just for the hormone free milk. If I bought all our food there, I'd probably spend more than $200/week, easily. It sounds like we eat pretty much the same way you do. I bake cookies often and make things like bannana bread for snacks. I buy pretzels, but not chips or doritos or anything like that. I also rely on air-popped popcorn for snacks. It has some nutritional value and it's really cheap. My sister gave us a popcorn popper for Christmas 9 years ago and I use it regularly. It's one of the best gifts I've ever received.
In the summer, I skip the natural foods store and buy produce, eggs and cheese at the farmer's market. I also have a small vegetable plot and we pick strawberries, blueberries, and mulberries and preserve them. (We just go to U-pick farms.)