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Casio Calculator Tutorial - Overview of Essential Buttons (fx-83GT PLUS, fx-85GT PLUS, fx-300ES) - YouTube
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Casio FX 260 SOLAR II Scientific Calculator - 144 Functions - Easy-to-read Display - 10 Digits - Solar Powered - 5" x 0.6" x 2.9" - Black - 1 Each - Walmart.com
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