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

### Instruction:
 一支钢笔比一支铅笔贵9美元。如果一支铅笔的价格是2美元，求两种物品的总价。


### Response:
 铅笔的价格是2美元。
钢笔比铅笔贵9美元，所以9美元+2美元=$<<9+2=11>>11。
所以两种物品的总价是2美元+11美元=$<<2+11=13>>13。