The phrase "checkout counter" refers to the place in a store where you pay for your items before leaving. It is usually a counter with a cash register and a person who helps you complete your purchase. Full definition
Beware of deferred interest credit cards that will be offered at checkout counters while you do your holiday shopping! (wisebread.com)
The size of the car we drive to the supermarket and its effect on climate may indirectly affect the size of the bill at the supermarket checkout counter. (earthpolicy.org)
It used to be the inevitable question asked at the grocery store checkout counter. (petbusiness.com)