Ключевые слова: background, bank, banking, benefit, black, bonus, business, buy, calculation, cash, cheap, commerce, commission, concept, costless, credit, digit, discount, fee, finance, financial, free, friday, hand, inflation, interest, investment, loan, marketing, money, number, off, percent, percentage, price, promotion, rate, retail, sale, shopping, sign, stock, symbol, tax, unpaid, vat, zero,