How to find sum of values ​​in google spreadsheet by key?

Question

Google Sheets

There is such a table:
https://docs.google.com/spreadsheets/d/1GSUBEjnO0C...

In table 1, you need to find the sum of all values ​​​​from table 2 by "key"


I tried the lookup function + sum, but something like that Did not work out

Answer 1

Like this. Registered an example in your table
=СУММ(FILTER($F$2:$F;$D$2:$D=A3))