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

### Instruction:
 一辆拖车上有50000磅的货物。第一家商店卸载了10%的重量，第二家商店卸载了剩下货物的20%。两次交货后，卡车上还剩下多少磅的货物？


### Response:
 第一家商店：50000(.10)=<<5000=5000>>5000磅
50000-5000=<<50000-5000=45000>>45,000磅
第二家商店：45,000(.20)=9000磅
45,000-9,000=<<45000-9000=36000>>36,000磅