【单选题】When a manufacturer offers a ________, a customer buys a product from a manufacturer's dealer within a specified time period, and the manufacturer sends the customer a check.
【简答题】Usually when a customer buys something, he wants to pay at a low price,but the seller prefers a high price,so the commercial strategy(商业策略)for a seller is to ask for a high price and give in slowly,wh...