Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 一包椒盐脆饼的价格是4美元，而一包薯片的价格比它贵75%。马切克去买了两包薯片和两包椒盐脆饼。他一共花了多少钱？


### Response:
 一包薯片比一包椒盐脆饼贵75/100 * 4 = <<75/100*4=3>>3美元。
这意味着一包薯片的价格是4 + 3 = <<4+3=7>>7美元。
所以马切克花了4 + 7 + 4 + 7 = <<4+7+4+7=22>>22美元购买这些零食。