Multi store multi currency with Magento
- You need to set-up multiple websites, one for every currency (not simply store views, complete websites)
- Set ‘Catalog worth Scope’ to ‘Website’ in System > Configuration > Catalog
- Set the bottom Currency of every web site to its various currency in System > Configuration > Currency Setup
- Set all of your currency rates to ‘1.0’ in System > Manage Currency Rates
- Now you'll be able to set your product costs per store once writing a product, voila!