What is the difference between the Casio FX‑991ES and 991ex? Which one should I prefer for my VTU exams? - Quora
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METRO BOOKSTORE - Calculator Casio : - FX-991 ES PLUS : Rp.340.000,- - FX-991 ID PLUS. : Rp.279.000,- - FX-570 ES PLUS : Rp.308.000,- - DH-16 : Rp.207.000,- - DX-120 ST :Rp.199.000,- -
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