There's a lot to say about the limits of the economics law that prices are determined by the market, which marginalist economics will defend as absolut truth. At the consumer level, prices are not so much about competition, and mostly about a expectations game based on what the product is supposed to cost, which may or may not have anything to do with the cost of production - marginal or average. For example, the French bread makers are raising their prices quickly with the noise of the food crisis, despite the fact that wheat only accounts for 10% of the cost of bread.

Un roi sans divertissement est un homme plein de misères