Splaks Calculator, 3 Pack Standard Functional Desktop Calculator Solar and AA Battery Dual Power Electronic Calculator with 12-Digit Large Display (2 Basic Black&1 Updated Silver)

[M+] Adds the number shown on the display to the number stored in the memory. Example:3*8 + 2*6. If you directly inputs these numbers to the calculator,you will see the wrong answer: 156. If you press [3*8], [M+], [2*6], [M+], then press [MRC] once, you will get the right answer: 36. [M-] Subtracts the number shown on the display to the number stored in the memory. [MRC] Combination of [MR] and [MC]. [MR]: Recall the current memory register value. [MC]: Clear the memory register (set to zero). When you press the key once, the [MR] key was activated, when you press the key twice, the [MC] was activated. [GT] Whenever the [=] key has been pressed, the result will be stored into the Grand Total Memory Example: If you want to calculate [2*3+3*5+6*8],press [2*3=], then [3*5=], then [6*8=]. Then press [GT], you will get the right answer 69 [MU] Stands for Mark Up, which is for calculating GROSS PROFIT MARGIN (GPM). Example: Enter [100] then press the [÷], then [15] then [MU] key, you will see 117.65 (15% of this...