Drageraser,
A round-trip pass within canada will cost you about 30$ Canadian, or around 23$ U.S.
To the States it's more because you have to pay the U.S immigration tax, security tax etc...and that will come out to about 50$ CAD or 40 US$ a round trip.
I just used one to Europe and that will set you back about 60$ CAD on taxes.For Asia and the Middle East it varies on the local country's taxes but you will probably not have to pay more than 80-100 $ CAD anywhere.