Random (Inflation) Conversation...
When I was recently in Beijing I stopped at a small place near the hostel to get some meat baozi (steamed buns filled with meat), which cost 3RMB for one tray. The next day I went back with two friends to get some for breakfast. This time we bought a tray of baozi and one of steamed jiaozi.
Seller: 一共十块钱。 (Altogether it's 10RMB)
Me: 等一下。 这铁包子多少钱？ (Wait a second, how much is this tray?)
Seller: 五块钱。 (5RMB)
Me: 哪，昨天是三块钱。 (Yesterday it was 3RMB)
Seller: 什么？ (What?)
Me: 昨天这是三块钱。 (Yesterday this was 3RMB)
Seller: 呵呵。 (Haha)
Then he gives us back 2RMB change.