u.s. postage cost
Accuracy Project. U.S. Postal Service postage rates. New postage rates became effective January 22, 2012: * Letters (1 ounce) - An increase of 1-cent to 45 cents. * First-Class letter additional ounces (for letters over 1 ounce) remain unchanged at 20 cents. * Postcards - An increase of 3-cents to 32 cents.