Your base currency is USD. You have created a purchase order for 50 filters at 9 CAD each from a company in Canada. The price of the air filters must now be converted to USD. Assuming that the exchange rate is 1.2 CAD-USD, Datastream 7i calculates the following conversion:
50 air filters @ 9 CAD = 450 CAD;
450 CAD/1.2 = 375 USD