英语翻译因为原材料上涨.我们的单价有变动.我们的单价将在5月份进行调整.请谅解给您带来的不变.随函付上我们的单价表.

我看得不是很明白,如果楼主的意思是：附件里的单价就是调整后的5月份的价格的话,可以这样翻译：
We adjusted prices in May due to cost increase of raw material.
Enclosed ( Attached) is the up to date price list for your reference.
So sorry for any inconvenience caused.
如果不是上面的理解的话,直译如下：
We made come changes of prices due to cost increase of raw material.Pls kindly check attachment.
What's more,our price will be adjusted again in May.So sorry for the inconvenience it caused.

Our unit price has to be updated owing to the rising cost on raw materials.
The updated price will be released in May.
Sorry for any inconvenience caused.
Please see our quotation attached.

The prices of raw materials have increased, so our price per unit have some changes. The new price per unit will be ajusted in May. For the unconvenience it may bring to you, we're sorry and please forgive us.
Our price table is attached with this email(mail)