Which is better, the Casio FX991 EX or FX 991 CW? What is the difference between these two calculators? Which one should I get? Is FX 991 CW the best non-programmable calculator? -
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Scientific Calculator Casio Fx-991ex Classwiz With Solar Battery Non-programmable And Allowed For Ege 552 Functions Carbon Body Design - Calculators - AliExpress