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Amazon.com : Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural : Office Products
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Casio FX-991ES Plus Scientific Calculator FX991ES + FX 991 ES, 417 Functions New 4971850182276 | eBay
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Casio Scientific Calculator FX 991 ES PLUS, Size/Dimension: 162mm X 80mm, Model Number: Casio Fx-991es Plus at Rs 980 in Bengaluru
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