Ключевые слова: background, buy, buyer, communication, concept, copy, cost, credit, digit, discount, ecology, emissions, female, finance, financial, fingers, hand, holds, increase, interest, marketing, mathematical, minimum, number, numeral, pay, percent, percentage, person, plan, price, promotion, rate, reduction, sale, shopping, showing, sign, smiling, space, strategy, symbol, technology, white, yellow, young, zero,