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

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Casio FX-991EX Engineering/Scientific Calculator

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Casio FX-991EX Engineering/Scientific Calculator

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Casio FX-991EX Engineering/Scientific Calculator

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Casio FX-991EX Engineering/Scientific Calculator

Casio FX-991EX Engineering/Scientific Calculator

Casio FX-991EX Engineering/Scientific Calculator

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Casio FX-991EX Engineering/Scientific Calculator