It'll probably end up being around 30 bucks AFTER your check out. Canadian shipping can be a pain in the ass. If it's delivered to your door, it's about double what it is if you pick it up at the post office.
Dogfunk isn't responsible for the extra charges that Canada post or UPS/Purolator applies, and they can't really calculate it.
I've had an online order cost 22 dollars through Canada post, and an order of the same size cost 58 extra with door delivery. Trenton is about half the distance from the border as Sudbury, so I'd assume it'd be between 18 and 32 bucks extra after the online payment is complete.
Note: In no way at all am I discouraging Canadians to order. But the hidden Canadian shipping cost is usually overlooked, and can make for a nasty surprise.