Ключевые слова: 20th, account, background, banknote, bill, business, cash, charge, charges, commerce, concept, consumption, cost, currency, economy, electric, electrical, electricity, electricity bill, electronic, energy, environment, euro, expenditure, expensive, finance, financial, gas, grade, heat, home, house, increase, kilowatt, meter, money, oil, outlet, plug, pound, power, price, raise, reader, save, saving, savings, supply, symbol, technology,