Magento custom currencies in admin and customer page

Hi there i have a customer who have a magento site and this customer have 2 producers who are sending him products with prices in euro (european currency) and dollars. I would like to have in admin/add new product on price tab i would like to have 2 fields one for euro and one for dollars and if i have a product from that producer in euro i put there euro if i have a product in dollar i put there dollar price. In customer page i would like the prices to be converted to RON (romanian currency), if you think you can do this let me know, regards