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How about "Bose QuietComfort Headphones"?

Looks like Amazon.com has them for $177.50 USD...but what will that cost me?

After applying today's exchange rate of $1.3042 USD/CAD (July 13, 2019), adding the 2.5% that our credit card will charge us, and then 8.5% sales tax for Sumas, WA...

Comparizon Estimate Price of $257.45 CAD

How does that compare to the Canadian price?

Amazon.ca has the same item listed for $295.00 CAD. After adding 12% tax for B.C., we get an estimated price of $330.40 CAD, for a savings of $72.95 CAD! You save 22%, and Comparizon.ca does all the Math!