Its simple, See for example Borderlands in Steam Using
US Country code, then with
AU Country Code, now try
South Africa and
United Kingdom and
France
Using current exchange rates it looks like this:
United States =
$20 USD =
R218,99
Australia =
$40 AUD =
R393,06
South Africa =
$20 USD =
R218,99
Britian =
£20 =
R364,40
France =
30€ =
R451,41
Understand it a tad better?