Answer:
My family purchases a lot of things every day, most of them we don't even realize we are purchasing them or we take it as something completely ordinary, e.g. I'm purchasing electricity and internet services while answering this question and I really don't think about it. At the end of the month we just pay the bills. We usually only notice that we are paying for these services when a big storm comes and the electric system crashes, and we start to complain why don't they build better systems.
When we go to the supermarket or a grocery store we just pick the things we like and pay for them. I guess we have a pre-established idea of how much things should cost and only notice their price when they change (e.g. offered at a discount or its price suddenly increases a lot).
Although that doesn't apply to all our expenses, when we shop for clothes, electronics or pay gas, we really pay attention to the price. I guess that since clothes are something you don't buy everyday or every couple of days, I guess once a month at most. We usually compare the price of clothes and electronics a lot, internet websites are very useful for this. Since there are several gas stations near our house (3 in total), we usually go to the cheapest one since we spend a lot on gas (about $300 a month).
I guess that the goods and services we buy are priced differently:
