How to sum up a column in Matlab?

I have created a table as attached in Matlab. How do I create a new row which shows the total of Moles?

Answer 1

[KSSV]

iwant = sum(T.(4)) 

[ONG ZHI SAN]

is it possible to add the answer in the table?

[KSSV]

You see sum is going to be a single number and your table height (number of rows) is more, it looks wierd to add a single number to the table.