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Amazon.com: Casio FX-991EX Engineering/Scientific Calculator, Black, 3" x 6.5" x 0.4" : Everything Else
Amazon.com : FitSand Hard Case Compatible for Casio FX-991ES Plus Scientific Calculator : Office Products
Amazon.com : Aproca Hard Storage Travel Case Fit for Texas Instruments TI-30X IIS 2-Line/Casio FX-991EX Fx-82es Plus Scientific Calculator : Office Products
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