My (faulty at times) memory says some things have doubled over the last 2 or 3 years.
I don't know if it is factored in, but things that would store seldom go on sale. We used to buy extra peanut butter, detergent, canned goods, anything we would use when it was on special. I still have to argue with myself to buy things without the shopping around. The extra gasoline is an ignored consideration. We still plan, Walmart produce is usually poorer quality than a further away grocer, and there are still a few luxury (Target couponed filet) we splurge on.