The price of things we buy is based on how much it costs to make and how much we value it. This article talks about how prices usually go in the same direction as costs. It looks at different types of costs, like fixed and variable, and how they affect prices. For industries that need a lot of money to run, like energy companies, costs go down as they use their equipment more. The article shows how a company's future can change based on how costs and prices move together.