Problem with Multiple Currencies

[colourfulbeads]

Dear All,

 

I originally set my currency default to AUD. However, as I'm now expanding to US and Canada, I want to give my customers option to change in their own preferred currency. During the browsing period i.e. before they reach the final checkout, customer can choose the currency but during the checkout it's all in AUD. Is there something that I can do about it? Please advise.

 

Thanks!!!