In Toronto, the cheapest beer (Bohemian, or any of those buck-a-beers) is $14.50 for a 12 and $26.40 for a 24. "Normal" macrobrewery beer (ie. Canadian) is 22.50 for a 12 and 40 for a 24. These are Beer Store prices for those wondering. LCBO is slightly cheaper if they carry it.
How much does beer cost in your city?