How can I implement a site listing and transferring in different currencies?

we are building a site that will contain stores from different countries and will list prices and transfer money in the local country’s currency. It is a site that will list stores by country and users will be able to buy online by credit card, debit card, cash, money orders through paypal and other local way of paying. But How can that be done through paypal? Or paypal only accept dollar exchange? or will the mexican peso be transfered to the paypal account from the mexican online stores affiliated in the site ?