Casio calculator

Casio DS-1B office calculator, 10 digits, large display, gray/black product number DS1B basic features designed and made for ease of operation main operations stored in cache, so nothing is lost even during high-speed input equipped with symbols (+, -, ×, ÷) on the screen to know the current calculation status characterized by automatic calculation of price plus tax and tax-free price and discount and selling price and tax value and discount value and the difference between purchase price and selling price solar powered when lighting is sufficient; and battery operated when lighting is insufficient