My post office just told me that irc's are no longer available and that you will not be able to get them anywhere.

I apologize for asking this. I know there is a post on here about it, but it is by weight and I'm a little confused. I would like to send a legal sized letter with a sase inside, usually costing .41 in the USA. How much to send it to England and France. On the 9x12 sase inside that I want the celebr...

I'm sure this has been asked a thousand times, but I can't seem to find the answer. How much postage do I need to put on a outgoing legal sized letter with a 9x12 sase envelope inside it? How much postage on the 9x12 sase? How much postage on a 9x12 sase inside a 9x12 sase? and how much postage on a...