Everything went well until the bills started coming.
$50 cdn for the catalogue
$50 cdn for the shipping
$24 cdn for duty (because you combined catalogue and shipping, so duty was on $100. instead of just the $50
there is normally no duty on printed material (educational)
Improvements or suggestions
quote prices in the currency of the country you are shipping to
separate the cost of the items from the shipping for duty purpose
make sure you know what is "duty free" i.e. educational material and label package correctly as such