我去了沃尔码，买了许多东西有薯片、薄饼等许多东西。结帐，我发现这几十元竟都是我的东西。

I have gone to walmart, bought many things to have the potato piece, the pizza and so on many things. The pay up, I discovered this several dozens Yuan unexpectedly all are my things.

楼主，你中文都有问题，学什么英语～

楼上好象是机器的哦~
I went to the walmart,and bought many things ,such as : potato chips,pizza. Then I paid up, I found the several dozens Yuan were unexpectedly all my things.

I went to WAL-MART ,Buy a lot of things have potato chips, pizza and many other things. Checkout, I discovered that this amount had all my things.

I went to the walmart,buying lots of things such as potato chips,pizza and so on.When I paid for them,I found several dozens yuan were my all things unexpectedly.不能用discovery,它带有探索的意思,顶楼有语法错误的