I created one table and one chart for sum. but table is showing correct figures but chart's sum is not showing same as table sum. for table sum, I took export to excel and made sum. both are not same.
I didn't think so if I look on your app - one simple table-load within the script and then a sum(), no joining or transformations. If records are doubled then are they doubled within your source. Therefore my suggestions to check the data-quality from source-data to find the why and how.
