Investopedia explains 'Menu Costs'
The net result of menu costs is that prices are sticky. That is to say, firms are hesitant to change their prices until there is a sufficient disparity between the firm's current price and the equilibrium market price. In theory, a firm should not change its price until the price change will result in enough additional revenues to cover the menu costs. In practice, however, it may be difficult to determine the equilibrium market price or to account for all menu costs, so it is hard for firms and consumers to behave precisely in this manner.
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