At the electrical goods shop:
Hi, were you looking for something? Do you need any help?
Not really, I think I've found what I was looking for already
Yes, I'm looking for a battery charger and... aren't these the battery chargers?
Huh... yes... I guess... So what else can I help you with?
I guess... nothing? I'm fine, thanks
But do you need anything else? Batteries?
This charger already comes with batteries. Besides, I've got batteries already, thanks.
Maybe... mmm... an extension cable?
No, thank you
(picks charger and goes to the till)
The cashier reads the barcode, and before completing the process goes on to ask the magical question:
Is that all? Don't you need anything else? Batteries... or maybe an extension cable?