Northern Light
Superstar
Crazy expensive! You can get the same Molson 30 pack in Buffalo for $25 lol
That's in USD, right?
If so, that's $33.94CAD
Still a bunch cheaper to be sure, but not quite as extreme as it first looks.
The principle difference is excise tax, particularly provincial.
This graphic is six years old now......but very illustrative:
Based on the above, the difference is about .67c on each can.
A difference of $16 for a 24 in the example above, and if you extrapolated that to 30 its an extra $20 in tax in Canada embedded in the price.
Brewer's Retail and LCBO markups account for most of the rest.