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

### Instruction:
 为了筹款，妮莉需要卖出45卷礼品包装纸。到目前为止，她已经卖给她的祖母1卷，叔叔10卷，邻居6卷。妮莉还需要卖出多少卷礼品包装纸？


### Response:
 到目前为止，妮莉已经卖出了1 + 10 + 6 = <<1+10+6=17>>17卷礼品包装纸。
她还需要卖出45 - 17 = <<45-17=28>>28卷礼品包装纸。