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

### Instruction:
 纳迪亚被派到花店买20朵玫瑰花和3/4倍于玫瑰花数量的百合花。如果玫瑰花每朵5美元，而百合花每朵的价格是玫瑰花的两倍，计算纳迪亚买花用了多少钱。


### Response:
 玫瑰花的总费用是20朵*$5 = $<<20*5=100>>100。
纳迪亚买了3/4*20 = <<3/4*20=15>>15朵百合花。
每朵百合花的价格是2*$5 = $<<2*5=10>>10。
纳迪亚买15朵百合花用了15*$10 = $<<15*10=150>>150。
总共，纳迪亚买花用了$150+$100 = $<<150+100=250>>250。