This image is taken from the last printed version of CARD: Canadian Advertising Rates and Data. It presents the cost to advertise in various media outlets, this case is Maclean’s a popular news magazine mostly read in Ontario.
Notice how you have various costs, from black & white, 1 color and 4 colors. Also, some other options such as free standing inserts (FSI) and classified ads. The readership of Maclean’s is the last thing showed, including total paid, complimentary and newsstand.