Tested and in working order. 

The Casio HR-8TM Printing Calculator is a reliable and efficient tool for businesses and professionals who need to calculate taxes and currency conversions accurately. With its 12-digit display and regular key size, this desktop calculator offers users a convenient and precise computing experience. Powering the calculator is a combination of a power cord and batteries, ensuring that users can continue to rely on its functionality even in situations where one power source may be unavailable. The Casio HR-8TM model is known for its durability and performance, making it a valuable addition to any office setting.