2. MR = Memory Recall (Get the number from memory which you have keyed earlier in the memory.)
3. MS = Memory Store (Puts the number into the memory.)
4. M+ = Add the number to the number into the memory.
5. M- = Subtract the number from the number into the memory.
6. C = It just clear the last number you put in.
7. CE = Clear everything to start all over again.
