To buy and sell in multiple currencies

When you buy and sell in multiple currencies you calculate your selling price in the currency that you bought it in.  But this is a problem if you enter the selling price in a foreign currency, and try to sell it in another foreign currency.  The system will give you a zero price.  If you sell in the same foreign currency as your price, no problem.  But if all your selling prices are in base currency, then it is no problem to sell in any of your foreign currencies.

If when you enter a selling price in a foreign currency, in the system,  then the system could make the calculation based on your currency exchange rate, and store the selling price in your base currency. Then you can sell or print price list in whatever currency you want.  It also would be good to show your selling price in the foreign currency in Selling Price maintenance for updates etc.

Or maybe there is another way?