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I bought this Casio fx-CG20 from a local store for 15$. I can clearly say its a huge improvement after my grandfathers sld-767. : r/calculators
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CASIO FX-9860 GII + Casio FX-CG 20 Begleitheft: 9783812013055: Ott, Roland, Bohner, Kurt: Books - Amazon.com
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