Customers can be very funny. They bought quite a number of stuff but refused to believe that they had spent so much. They wanted us to count the items again.
After doing second counting, they were satisfied. Didn't they know what they were buying and the cost of those items?
Because of that, they wasted our time and their own. I wish they had mentally added up their total cost of their purchases before buying them. In that way, they would be prepared and not realizing that they hadn't got enough cash to pay..