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

### Instruction:
 Tim去做了一次美甲，给美容师打了30%的小费。如果美甲的费用是30美元，他总共支付了多少钱？


### Response:
 他给了30*.3=9美元的小费。
所以他总共支付了30+9=39美元。