The Calculator CASIO JW 200 SC black can solve simple arithmetic problems, which makes it ideal for school and office work. You'll appreciate the basic functions - root and percent. The calculator also comes equipped financial functions such as vAT calculation, total sum and currency conversion. This model's advantage is its combination of a solar panel and a battery, which brings down its energy consumption. This calculator comes with a 2row display for 12 digits. You'll appreciate the protective case that guards against accidental damage.