Casio DJ-220D Plus 12-Digit Financial and Business Calculator, Black/Beige

You can add steps to or delete steps from calculation memory. Compare the results of two calculations. Automatic totalization of the results of different calculations. The recheck function allows confirmation of errors by sound when checking calculations. If the user presses an incorrect key when performing a second calculation to check calculation results, a buzzer sounds to alert the user of the error. Features Review up to 300 calculation steps. Add steps or delete steps Recheck with sound assist