给没有标点的英语添标点,有些单词要写成大写的

Dear Sirs,
We have received ur letter dated 23rd,asking us to cover insurance on the captioned order with picc,against all risks and war risk for an amount of 30% above the invoice value.Although it is our usual practice to insure shi pements for the invoice value plus 10%,we are prepared to comply with ur request.
But the extra premium should be for ur account.We trust the above information serves ur purpose,meanwhile,we wait ur early reply.
Urs faithuly