When we acquire things, mostly by buying or when someone gives it to us, we associate this object by its cost. “This costs half my monthly salary“, or “This looks cheap!”. While this may seem obvious from our perspective, in reality, this is only a part of its true cost.
There is an excellent article from Raptitude about this, titled Everything Must Be Paid for Twice. The author said that the first price is what we pay to gain possession of something. Once we obtain it, we must also then pay a second price, which is the effort needed to utilize and reap the benefits of that thing.