Customers' willingness to replace a costly item with a less costly item is an example of ..

Marginal utility is the extra usefulness or additional satisfaction a person gets from acquiring or using one more unit of a product. Diminishing market utility is the feeling that as we use more and more of a product we no longer receive the extra satisfaction we get from using additional quantities of the product.

answer; blank(1); /rises; blank(2); //increases;