Ключевые слова: blackboard, board, business, buy, calculate, capital, cash, chalk, chalkboard, chronometer, clock, closeup, concept, credit, data, deadline, economy, finance, financial, handwriting, indoors, invest, investment, market, message, minute, money, plan, profit, purchase, rent, revenue, save, shopping, stock, stopwatch, success, symbol, text, time, timer, watch, wealth, word,