I need help regarding with wpdatatable usage.

Hello,

I’m using wpdatatables with gravity forms integration plug in, and I need help figure out the solution to save average or total integer(numeric) data in one column as the same column data so I can use it for creating graphic chart or present in the page. I create wpdatatalbes based on gravity forms entry data, and I can get the total numeric value as new column by using formula column function, but it only adds the integer data from a single row left to right, not a single whole and separate column, and even the average values I can get for a whole column is not available as actual data value stored in a column such as the original numeric value. Is there really no way to do that just like I can do so in the other database table like mySQL? I really have to get and store total and average values of numeric data from each columns in a new column so I can create graphical chart base on it for my project. Please give me a proper answer as soon as possible since it is a very urgent and important thing for me do finish. Thank you.