Ключевые слова: background, borrow, business, businessmen, buy, buyer, cash, competition, concept, consumerism, contract, corporate, debate, economy, employee, employer, exchange, finance, guy, idea, investment, job, labor, loan, male, man, market, mind, money, negotiation, opportunity, payment, people, person, price, profit, psychology, rivalry, salary, sale, self, seller, service, share, success, trade, transaction, two, wall, worker,