This is basic office desktop calcutor with 12 Digits Large screen LCD display, dual solar power and battery power, big button Calculator for office, home, and school(Black)

NOTE:Before enjoying the function below ,please insert one AA battery for backup, then combines both solar power and battery, there can provide reliable and uninterrupted use.

Function description:
1.[M+]: Memory Plus.

2.[M-]: Memory Minus.

3.[MR]: Memory Recall.

4.[MC]: Memory Clear.
Example: Calculate [3*3+2*5-2*3], you can press [3*3], [M+], then [2*5], [M+], then[2*3], [M-], and press [MR] once, you can get the right answer [13]. and then can press [MC] to clear the memory.

5.[GT]: Grand Total.
Example: Calculate [3*3+2*5+2*3], press [3*3=], then [2*5=], then[2*3=]. Then press [GT], you will get the right answer [25].

6.[CE]: Clear Entry.

7.[▷]: Backspace.

8.[MU]: Mark-up and Mark-down.
Example: Enter [4+32], [MU], then get the result of [(4+32)/32]*100
Enter [90-80], [MU], then get the result of [(90-80)/80]*100
Enter [80*10], [MU], then get the result of 80*(100+10)%/100%
Enter [80/10], [MU], then get the result of 80/(1-10%/100%)

9.[AC]: Clear all formats and zero.