請問英文應該點寫

The new prices are applicable with the attached purchase order (PO).

1. Price應為眾數。
2. 由於新價錢已定，所以不應使用未來式。
3. 新價錢是指貨物的價錢，而並非PO的新價錢，PO只是應用了新價錢計算，所以不應用to為介詞。

New price(s) will be applied to the PO in the attachment.

New price(s) will be applicable to the PO on the attachment.

The PO of the attachment, a new price will be used.

前面的一句如果用 attachment of the PO,會變成PO的附件,
而因為後半部分沒有標明人物,所以要用被動.

Attachment of the PO, will use the new price