A:Good morning!

B:Good morning! Can I help you?

A:Yes, thanks. I'd like to see those trousers in the shop window.

B:Which one?

A:The black one.

B:Just a moment please....Here you are!

A:Can I try on they?

B:Yes, of course.

A:Where are fitting rooms?

B:Over there!

...

A:How much are they?

B:They're 40 pounds.

A:I think I will buy they, but first can I try on these trainers?

B:Sure!What size are you?

A:I'm 8

…

A:They're really comfortable! How much are they?

B:They are 20 pounds.

A:Okay, I'll buy the trainers and the trousers.

B:Total is 60 pounds.

A:Here you are! Bye bye!

B:Goodbye!