From the tirerack website:
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IMPORTANT INFORMATION — PLEASE READ!
CANADIAN ORDERS:-----------
- The sales taxes and duties included in this order are collected on behalf of the applicable Canadian government agencies. No additional taxes, duties, or fees will be collected by UPS Canada upon delivery of this order.
- Delivery may be delayed by customs procedures.
Which means USP no longer charges brokerage fees. The tire tax ($4 a tire), duty ($4.50 a tire), $15-30 brokerage fee, and GST are now collected. WOO HOO!