Amazon.com : OSALO Scientific Calculator 417 Function 2 Line 10+2 Digits Written Display Solar Scientific Calculator (OS 991ES Plus) : Office Products
Amazon.com: Casio FX-991SPX II Iberia- Scientific Calculator, Recommended for Spanish and Portuguese Resume, 576 Functions, Solar and Grey/White : Casio: Office Products
Amazon.com : Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural : Office Products