Ключевые слова: addition, arithmetic, bookkeeping, button, calculations, calculator, careful, closeup, crisis, declaration, digital, digits, duty, electronics, expences, expenses, finance, fiscal, gray, grey, key, keyboard, macro, management, market, mathematics, modern, money, on, payment, percentage, planning, plastic, pragmatic, precise, recupel, red, return, revenue, science, shopping, simple, square, sum, tax, taxation, technology, textured, total, vat, verification,