A toy store sells balloons that are immediately inflated with helium. So the balls themselves cost 50-70 kopecks, while in other stores they cost from 1 ruble. And the balls themselves are very dense and with an original pattern.
The child wanted to buy a balloon, stood near the cash register, at that time the cashier was not at the workplace. The seller was standing on the floor at that time, and did not pay attention. Then a girl came up to the checkout with the goods, and the seller SERVED the first girl, not the child, who was already standing at the checkout.