I never got this TBH. In Germany and Europe it's simple: the price on the item is what you pay at the cashier, at least of you pick the cheapest payment option

I never got this TBH. In Germany and Europe it's simple: the price on the item is what you pay at the cashier, at least of you pick the cheapest payment option (cash). Most don't bother to charge for other payment methods, a surprise price basically never happens. Credit card payments are capped at 0.3% of the transaction value. Large credit card cashbacks don't exist for that particular reason. But it's dead simple to know the price.