Ключевые слова: abstract, account, accounting, background, banking, business, cash, clock, coin, coins, concept, copy, countdown, currency, deadline, deposit, dollar, earnings, economic, economy, exchange, finance, financial, growing, growth, hour, hourglass, interest, invest, investment, loan, management, measurement, money, payment, pink, profit, purple, rich, sand, saving, space, stack, statistics, time, timer, treasure, urgency, wealth,