What helps a consumer determine the quantity of something to buy? marginal cost marginal error marginal benefit marginal comparison

When consumers are deciding how much of a product to buy, they often weigh the marginal benefit against the marginal cost. Marginal benefit refers to the additional satisfaction or utility gained from consuming one more unit, while marginal cost represents the expense incurred for that additional unit. Making smart choices involves ensuring that the benefit received is greater than or equal to the cost incurred. A common mistake consumers make is ignoring diminishing returns; as they consume more of a good, the added satisfaction from each additional unit might decrease. For example, eating one slice of pizza might be delightful, but by the fourth or fifth slice, even the most devoted pizza lover may start feeling less thrilled. Balancing consumption with this principle can lead to better purchasing decisions.