sumif for multiple criteria

Giganews Newsgroups
Subject: sumif for multiple criteria
Posted by:  Inter
Date: Wed, 17 May 2006

I'm trying to sum the contents of multiple rows based on specifying 2
criteria, e.g.

downloads  brand  country
    5                A          US
    10              A          US
    10              B          UK
    5                B          UK
    10              A          UK
    10              B          US

And i want to add the downloads for brand B in the UK...

A bit of help would be much appreciated.