Adding comma with text

[kauser]

Hello, 

i am trying to add comma on a column and it has text as the end. how can i add comma to it.

current output 

F1	F2
43875	2134234
46767	698798
1232343	6756757
Total Sum	689789

Expected Output

F1	F2
43,875.00	2,134,234.00
46,767.00	698,798.00
1,232,343.00	6,756,757.00
Total Sum	7,689,789.00

i also tried Toround, ToString and when i change column to double from string then i last line become Null from Total Sum. 

[Qiu]

@kauser 
I just learned recently that we can add thousand seperator with ToString function.

[kauser]

@Qiu 

Thanks for your advice. its work but if there is decimal number then it wont work. can you please help to on input data below there data have decimal 

43875.45	2134234.34
46767.78	698798.56
1232343.12	6756757.34
Total Sum	689789.57

[Qiu · Accepted solution]

@kauser 
I did not consider the decimal number since it was not in your sample.
maybe we can do something like this.