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

### Instruction:
 Erwan went on shopping. He purchased a pair of shoes at $200 but discounted 30%, and two shirts at $80 each. Upon checkout, the cashier said that there is an additional 5% discount. How much did he spend after all the discounts?


### Response:
 一双鞋的总折扣是$200 x 30/100 = $<<200*30/100=60>>60。
他花了$200 - $60 = $<<200-60=140>>140买了一双鞋。
两件衬衫的总费用是$80 x 2 = $<<80*2=160>>160。
所以Erwan花了$140 + $160 = $<<140+160=300>>300买鞋和两件衬衫。
他在结账时额外获得了$300 x 5/100 = $<<300*5/100=15>>15的折扣。
因此，Erwan在所有折扣后花了$300 - 15 = $<<300-15=285>>285。