The shipping fees to Canada are absurd, $51 USD for three kits.
There are 4 different shipping options available. Fedex includes the duties and taxes in the shipping cost.
USPS First Class International - Generally the cheapest, although they recently had a price hike
USPS Priority International - Usually the most expensive
Fedex Economy - Cheaper for the actual shipping, but also include duties and taxes
Fedex Priority - Very fast shipping, but also includes duties and taxes.
These are actual shipping costs, and are not inflated.