Import and fill excel file

I have document in excel and need to put some results in fields which we calculated in 1c. I need solution how to create custom report or something like that. I already tried with Layouts/Spreadsheet. This is for one chosen document, but I need sum for one field from more then one document. It is necessary to write queries and result put in. Example:

Hello Nikola,

by the way, 1C has a very powerful reporting system. Do you know about it?

In most cases, the built-in reporting system is enough to not use Excel or other solutions...

But if you want to use Excel in your solution, then of course, 1C can save data to an Excel file.