A consumer's net gain is the difference between the price a consumer is willing to pay in order to obtain a commodity and the actual price he or she pays to obtain the commodity. Consumer net income measures the additional benefits that buyers feel they are getting.
By definition, which of the following options reflects the net benefit to the consumer?
Zhang manager intends to spend 20,000 yuan to buy his favorite watch, but after price negotiations, the last 18,000 yuan deal, than the original savings of two thousand yuan