Listen to the whole passage
Listen to the whole passage once first, then practice sentence by sentence.
The first line is the other person opening the conversation; the "You" lines are suggestions for you to practice saying in this scenario (not a back-and-forth dialogue).
A shopkeeper ringing up the total
你买这些，一共三十块。
These come to thirty yuan altogether.
You
一共多少钱？
How much is it altogether?
You
这本书多少钱？
How much is this book?
You
苹果多少钱一个？
How much is one apple?
You
这太贵了。
This is too expensive.
You
这个不贵，很好。
This one isn't expensive, it's good.
You
给你三十块。
Here's thirty yuan for you.
You
谢谢，再见。
Thank you, goodbye.