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$1.35
It depends on where you live.
about $13
That depends where you are posting it and how much it costs to post.
how much a first letter that weighs 2.1 oz cost to mail
You can mail a one-oz. letter to Africa for 94 cents.
.45 + .20 = .65
61 cents
That depends on where you are mailing it from.
Postage is 98 cents for an 1-oz. letter.
Try here: http://www.wikisummaries.org/The_World_Is_Flat
$1.10