This job lot includes three calculators: a Texas Instruments TI30, a Casio DC-7500, and a Helix Oxford. Each calculator has its unique features that make it suitable for different mathematical calculations. The Texas Instruments TI30 is a handheld device, powered by batteries, and is ideal for basic computing. The Casio DC-7500 is a regular-sized calculator that comes with a power source and can handle more complex calculations. Finally, the Helix Oxford calculator has a regular key size and display size, making it perfect for office use.

These calculators are from different brands, which ensures that you can choose a device that suits your preferences. The calculators are in good working order, and they will make a valuable addition to your office equipment. Whether you need a basic or complex computing device, this job lot has something for you. Get your hands on these calculators today and enjoy their precision and efficiency.