What conversion rates do Shopify use?

Shopify Partner
32 1 11


Looking for clarification on what rates are used? We have a product, for example, that is $265 USD. At the time of writing this, here are the conversion rates I can see:

https://example.myshopify.com/services/javascripts/currencies.js shows $344.28 CAD. 

https://cdn.shopify.com/s/javascripts/currencies.js shows $344.05 CAD.

However, Shopify shows the price $347.97 CAD on the front-end. 

The theme includes the /services/javascripts/currencies.js script but clearly isn't the rate being used.

Thanks in advance.