How to add data in a table from two different tables?

Question

Google

Colleagues, good morning.
Please advise how to display the sum from two different tables in the final table?
Those. employees of one group fill in the data on their sheets in the first document, employees of the second group - in the second document. I have a third document where I need to summarize the results of their fillings.
Thank you

Answer 1

I think the "ImportRange" function will help.
The help is well described: https://support.google.com/docs/answer/3093340