Tourists in Quebec are often caught off-guard by the province's two-layered sales tax system. With the proper math, however, determining the full cost of goods and services in Quebec can be calculated quickly and accurately.
Key the sales price of an item or service into the calculator.
Multiply the sales value by .05. The total amount will reflect the cost plus the Canadian Goods and Services Tax (GST).
Multiply the answer from Step 2 by .085 to account for the Quebec sales tax (QST). The total will reflect the final cost of the good or service.