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Casio FX-991EX Scientific Calculator has a high-resolution LCD screen which allows more information for applications like Spreadsheets and matrix

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Casio FX-991EX Engineering/Scientific Calculator, Black, 3 x 6.5 x 0.4 : Office Products

Casio FX-991EX Engineering/Scientific Calculator, Black, 3 x 6.5 x 0.4 : Office Products