Oh fun with exchange rates.
Look at the eBay/Paypal rate.
Look at the market rate on xe.com
Look at the rate on http://www.rbcroyalbank.com/cgi-bin/travel/currency-converter.pl which is the Royal Bank*.
There is no one rate. And all those rates could change on a moment's notice.
*I looked this up yesterday and it was $1 to 90¢. Today it is $1.00 to 89¢.