HP CalcPad 200Calculator, Battery operated, Solar cell, USB connector, Programmable, Economic functions, Currency Converter£29.88
‌Casio FX-87DE XCalculator, Battery operated, Solar cell, Display light, CAS (Computer Algebra System)£31.99
‌Texas Instruments TI-83 Premium CEGraphing calculator, Programmable, Colour screen, CAS (Computer Algebra System), Economic functions, Equation solver, Complex functions, Matrices, Statistical functions£151.90