They don't ask how much someone paid for something.
他们不问别人买某个东西要花多少钱。
I'm sorry, but I can't find the book you lent me.
很抱歉!我找不到你借给我的那本书了。
It's quite simple. You put a very hot, wet cloth on your shoulder for one minute. Then put a packet of frozen peas on the shoulder for one minute. And so on and so on.