收银员：您好。一共是45块6毛。需要塑料袋吗?

乐乐：不用了，谢谢。我有购物袋。请等一下，我找找。

收银员：好的。

乐乐：不好意思，我今天忘带了。请问塑料袋多少钱一个?

收银员：大号的6毛，中号的4毛，小号的2毛。

乐乐：那给我一个中号的吧。

收银员：好。一共46。收您50，找您四块，这是小票，请拿好。

乐乐：好的，谢谢。

(At the supermarket checkout )

Cashier: Good morning. A total of 43.60 RMB. Do you need a plastic bag?

Lele: No, thank you. I've a shopping bag. Please wait a moment. I'm looking for it.

C: Ok.

L: Sorry, I forgot to bring one. How much is one plastic bag?

C: The large one 6 mao, medium 4 mao, small 2 mao.

L: Give me a medium one.

C: Ok. A total of 46 RMB. You gave me 50 RMB. Here's your change of 4 RMB. It's a small banknote. Please accept.