Ключевые слова: back, business, buy, claim, client, communication, compensation, concept, consumer, customer, discount, exchange, finance, financial, guarantee, management, marketing, merchandise, money, package, payment, policy, procedure, process, product, purchase, rebate, receipt, refund, refundable, retail, return, returns, revenue, sale, satisfaction, sell, service, shop, shopper, shopping, store, taxation,