GT key: summation calculation, press = or % key, the result will add into the calculation (press one time to display summation, while press twice to clear the summation).
MU key: profit and loss operation key.
M+ key: memory plus.
M- key: memory minus.
MRC key: memory total value and clear memory key (press one time to display memory storage, press twice to clear memory).
GTIN: 6906494914868
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