Ключевые слова: 20, abstract, background, bank, banking, bill, budget, business, capitalism, cash, coin, colourful, colours, conceptual, cost, currency, depression, dollar, economic, economy, expense, finance, financial, group, inflation, investment, malaysia, malaysia ringgits, many, market, measure, measuring, monetary, money, note, paper currency, payment, price, reality, recession, reward, saving, stock, symbol, tape, tight, trade, units,