How to Lookup a Value in Another Table

Thanks!

The blog doesnt cover in depth on the Vlookup function---You do have a link to https://msdn.microsoft.com/en-us/library/gg492170.aspx

But I have studied that link and still cant figure out LookupValue.   I use Vlookup in Excell every day with no issue but cant grasp the dax language way of doing it.

Basiclly I have 2 Tables

Each table contains many many country records with many duplicates

I simply want to sum up each country Balance from each table and show the Balance from each country

In Excell it is very simple. In fact in my spreadsheets its not a problem doing a vlookup on a pivot table.

But Power BI DAX  syntax is written in 50 different ways throughout the Internet making it impossible to understand how to use it at the moment.