Operations on datatable / arithmetic average / weighted average
I have doubts how to solve a certain problem.
I have big table of numbers in DATATABLE. - Each row may have a different date - I need to sum the numbers in the rows - Then take the arithmetic average of the numbers in the row - Then I need to be able to select the date (range) to calculate the average of all days(rows) in the selected range.
I am wondering how I should go about this. How to divide the whole task into services?