Ключевые слова: account, accountant, accounting, bank, bank account, bank note, bank of singapore, bank teller, converter, currency exchange, dollor, economic, economic crisis, economic development, economic growth, economy, ecosystem, exchange, exchange money, exchange rate, expend, finance, financial, financial planning, income, money, paper note, polymer notes, revenue, singapore, singapore dollar, spend, value, value chain, value for money, yusof bin ishak,