Hi the only way you could do this is with the eStore and using the ‘Buy Now’ button option. With a shopping cart it can only support one currency at a time because you can’t add items with different currency to the same cart (PayPal won’t process this type of transaction). With the ‘Buy Now’ Button you can put something like this
USD Price $5.00 ‘Buy Now’ Button
Yen Price $15.00 ‘Buy Now’ Button
GBP Price $25.00 ‘Buy Now’ Button
The only thing with the ‘Buy Now’ button is they would have to make each purchase individually .