If you havn't made yor purchase yet, read the following link first for how to negotiate with dealers. http://www.consumerreports.org/cro/cars/7-ways-dealers-make-you-pay-extra-405/overview/index.htm
In Canada, you can not get the Dealer Invoice for free but you may do a little research on some US online car dealers to get both MSRP and Dealer Invoice.
From that ratio, you will have rough idea how much the Canadian delaer paid.