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

### Instruction:
 一些学生想从文具店买铅笔。一支铅笔的价格是20美分。托鲁想要3支铅笔，罗伯特想要5支铅笔，梅丽莎想要2支铅笔。学生们在文具店一共会花多少钱（以美元计）？


### Response:
 托鲁、罗伯特和梅丽莎一共想要10支铅笔。
由于一支铅笔的价格是20美分，学生们会在铅笔上花费20*10 = 200美分。
一美元等于100美分，所以学生们会在铅笔上花费200/100 = 2美元。