What do you need a ... for?
You need a basket to carry the food.
What do you need a shopping bag for?
You need a shopping bag to carry food.
What's this? How do you spell it?
This is a cashier.
What's this? How do you spell it?
This is a barcode.
What's this? How do you spell it?
This is a checkout
What's this? How do you spell it?
This is a supermarket aisle.
What's this? How do you spell it?
They are shelves.
What do you need ... for?
You need shelves to keep the food on.
What's this? How do you spell it?
This is a supermarket
What's this? How do you spell it?
This is a trolley.
What's this? How do you spell it?
This is a shopping bag.
What's this? How do you spell it?
This is a shopping basket.
What's this? How do you spell it?
This is a till.