if i were place an order for 500 units,what kind of dicount

題目：

if i were place an order for 500 units,what kind of dicount could you give us?
1,整句意思
2,時態,語法結構,以及關鍵詞
3 .爲什麼要用were,kinds of 與kind of discount 區別與用法

解答：

如果我下一個500個貨物的訂單.你會給我 們多少折扣