article_snippet.sent: Sales tax in the US depends on the region where the product is sold, but as an example California has one of the highest rates - at 9% - while Montana has zero.
article_snippet.sent: This is a difference of £42 when bought in California, compared to the UK, and £63 when compared to Montana.
article_snippet.sent: When sales taxes are added to the US model, the price rises to $18,530 in California, which converts to £12,543 - a difference of £957.
article_snippet.sent: In the US, California was chosen because California has one of the highest sales taxes at 9%, while Montana was chosen for the opposite end of the scale because California doesn't have a sales tax.
article_snippet.sent: Quebec in Canada has one of the highest sales taxes at 15%, while Alberta has one of the lowest at 5%.
article_snippet.sent: Sales tax is calculated by multiplying the purchase price by the  tax rate, which varies widely by jurisdiction, and ranges from zero to around 15 per cent in Canada.