I have a grid, I am trying to trying to create a header, that takes up the entire row and just says "SUM : 13"

I have a kendo Grid, that returns data, the sum of one of these columns is = 13, and store it so I can change a grid's title to: "Results: 13"

How can I do this?
I have declared a variable outside of that scope to hold that sum. I want to then... iterate through this, storing the data in that variable and afterwards, call a function to update the header title?

I cannot use headerGroup or footerDetail templates, as i need the data to be on the top, and headerGroup adds unnecessary information inside the grid.