填空题
The price system in the United States is very complex. It is composed of the prices of all the products bought and sold in the economy as well as those of a lot of services, including labor and transportation. The interrelationships (相互关系) of all these prices make up the "system" of prices. The price of any particular product or service is linked to a broad, complicated system of prices in which everything seems to depend more or less upon everything else.
If one asks a group of people what price is, many would reply that price is an amount of money paid by the buyer to the seller of a product or service. For a complete understanding of a price in any particular transaction, much more than the amount of money involved must be known. Both the buyer and the seller should be familiar with not only the money amount, but with the quantity and quality of the product or service to be exchanged. Besides, they should also know the time and place at which the exchange will take place and payment will be made, the form of money to be used, the credit term and discounts they apply to the transaction, guarantees on the product or service, and other factors. In other words, both the buyer and seller should be fully aware of all the factors in order that they may evaluate a given price.