补全下面的对话。

  W：Can I help you?

  M：Yes．These are nice．Can I try them on?

  W：Of course．What size would you like?

  M：Size ，please．

  W：Here you are．

  M：They're a little ．

  W：Let's try size 36．Are they OK?

  M：They're just right!How much are they?

  W：They're yuan．

  M：OK．I'll them．