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scientific calculator

CASIO fx-991cw Non-programmable Scientific Calculator
(LRBUTWDP)
Casio Scientific Calculator (2nd edition) Black - fx-991ES Plus
(JOPSP76B)
Casio Scientific Calculator 2nd Edition - (FX-991MS-2)
(S7OGEODW)
Casio 2nd Edition Scientific Calculator - FX-570MS-2
(F8I0GQY3)
Casio fx-100MS-2 Non-programmable Scientific Calculator
(W7KQOTYC)