This dictionary cost me 88 yuan.
I spent 88 yuan on this dictionary.
或者是
I spent 88 yuan (in) buying this dictionary.
1.第一句中 something + cost + somebody + 钱
2.第二句中 somebody + spend +钱/时间 + on + something
3.第三句中 somebody + spend +钱/时间 + (in) + doing (其中in可以省略)
至于为什么是spent而不是spend,那是因为过去式.