People are willing to pay for a unit of a particular commodity is determined by Marginal utility.
Explanation:
Marginal utility (MU) is characterized as the additional utility obtained from the use of one additional unit of a good or service, or the increased use of an increased unit by an entity.
Economists use the idea of marginal utility to assess how much of an item consumers can purchase. Positive marginal utility happens when the consumption of an additional item increases the total utility, while negative marginal utility occurs when the consumption of an additional item reduces the total utility.