![I bought this Casio fx-CG20 from a local store for 15$. I can clearly say its a huge improvement after my grandfathers sld-767. : r/calculators I bought this Casio fx-CG20 from a local store for 15$. I can clearly say its a huge improvement after my grandfathers sld-767. : r/calculators](https://preview.redd.it/i-bought-this-casio-fx-cg20-from-a-local-store-for-15-i-can-v0-q1qkxtydeema1.jpg?width=640&crop=smart&auto=webp&s=18869c7dc3366b64825c91c6fb2ac2aa6aaf7c41)
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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Amazon.com: CASIO PRIZM FX-CG50 Color Graphing Calculator,Black & White,7.21"Wx10.32"Lx2.05"H : Clothing, Shoes & Jewelry
![CASIO FX-9860 GII + Casio FX-CG 20 Begleitheft - Ott, Roland; Bohner, Kurt: 9783812013055 - AbeBooks CASIO FX-9860 GII + Casio FX-CG 20 Begleitheft - Ott, Roland; Bohner, Kurt: 9783812013055 - AbeBooks](https://pictures.abebooks.com/isbn/9783812013055-us.jpg)