I use the price tags in the store. They show how much each thing costs. If it's too expensive I don't buy it. Make potatoes and chicken your reference point. If it's more expensive think about a substitute. Next trick is that I think what I'm going to cook before I go to store, check what I'm missing and put it on a list. Then I buy things on that list. This helps me not to throw away food.

If you do both things and still spend $10.000 on food you're only choice is to eat less or eat things you like less which is silly if you can afford it. Tracking each transaction is an interesting hobby but will consume your time and not help you much more than simply being concious about what you buy and not buying things you don't need.