Unless you pay by credit in which case it's exact. As to how it works, unlike VAT added into the price, we've HST (varies ~13%) or GST (5%) to round up or down

Unless you pay by credit in which case it's exact. As to how it works, unlike VAT added into the price, we've HST (varies ~13%) or GST (5%) to round up or down by a few pennies on top of the stated price. I'm a bit surprised this is news. It's been well over a year.