In my country if you pay with credit card at a grocery store (or anywhere) you get 3.5% tacked on to your bill. Merchants don't eat the cost, and don't hide it

In my country if you pay with credit card at a grocery store (or anywhere) you get 3.5% tacked on to your bill. Merchants don't eat the cost, and don't hide it in the listed price of goods; it's explicitly passed on.