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SHARP EL-520X Calculator Instructions (Memory, Store, Recall, Modes, Fractions and more...) - YouTube
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Sharp Electronics EL520XTBBK Scientific Calculator, 10-Digit with 2-Line LCD Display (Solar and Battery Powered) : Amazon.ca: Office Products
Calculatrice scientifique Sharp EL-520X, Sharp EL-531XG | Appareils électroniques | Longueuil/Rive Sud | Kijiji
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