Purchase order/ orden de Compra

On the purchase order I need to prices. Please help
The reason is because;
Price 1 is the price the vendor sells to us
Price 2 is the price input on the purchase order for accounting records, and the final price that the goods cost us this is because we add to the cost shipping charges, import tax duties, custom agent charges.

Basically what I need is to show price 1 on the purchase order I send the vendor, and for accounting record used price 2.

Can this be done