A Weighty Party-Trick

(My parents run a general grocery store on a camping/caravanning site. I am 15 and work there. When mum goes on her break and I am alone, I love to watch the shoppers as they walk around putting items in their basket. I know the price of every item in the store so I add it up in my head. When they come to pay I ‘heft’ the basket – as if I am weighing it – and then announce the price.)

Me: “That will be £4.22.”

Customer: *gives me an odd look*

(I enter the items into the till, and it comes to exactly the same price.)

Customer: *looks amazed, and silently hands over the money*

(I overhear the customer talk to their partner outside the shop.)

Customer: “Do you know what that young lad in the shop can do? Amazing!”