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atFoliX Glass Protector for Casio FX-CP400 ClassPad II 9H Hybrid-Glass | eBay
Casio fx-CP400 help required, yes I have checked the manual... Have reseted it in everyway possible, and it keeps spamming "E". First time using this in years : r/calculators
User manual Casio ClassPad II FX-CP400 (English - 316 pages)