Jack and Alex want to buy some stationery（文具）. So one Saturday morning， they go to a stationery store.

Good morning， boys! Can I help you?

Yes. I want a ， a ， two and four .

OK. A ， two ， four and a . What color of the do you want?

Blue.

All right. Here you are!

How much are they?

A is one yuan. An is one yuan too. A is four yuan. And a is five yuan. It’s fifteen yuan in all（總共）.

What about you， boy?

I want a .

We have of red， yellow， green and blue. Which color do you want?

Which one do you think is better， the green one or the yellow one?

I think the green one is nicer.

OK. The green one， please. How much is it?

It’s ten yuan.

Oh， it’s a little expensive. And I want a ， two and a box of . How much are they?

A is ten yuan. A is two yuan. A box of is fifteen yuan. So it’s thirty-nine yuan all together（總共）.