I am using drupal 7 and commerce modules. I want a dynamic currency converter on product display page or cart page (priority is product display page). Suppose Product A is displayed with price 1 USD and user is from India or some other country then I want to give the user an option to change the currency before adding product to cart. If the user selects INR then the 1 USD will be converted to INR which makes it 67 and payment will be made in INR. How can I achieve this kind of functionality in Drupal ?
Suggestions are welcomed.