Office Calculators Desktop, 12-Digit Dual Power Cute Calculator with Large LCD Display Big Button for Office Home and School

[M+]: Adds the number shown on the display to the number stored in the memory.

[M-]: Subtracts the number shown on the display to the number stored in the memory.

[MR]: Recall the current memory register value.

[MC]: Clear the memory register(set to zero).

[GT]: Whenever the [=] key has been pressed, the result will be stored into the Grand Total Memory.

[MU]: Which is for calculating GROSS PROFIT MARGIN (GPM)