Sync to the furthest read page. With Amazon's Whispersync technology, you can automatically save and sync your furthest page read, bookmarks, notes, and highlights across all your devices. That means you can start reading a book on one device, and pick up where you left off on another device.
Calculate your postage rate using the international postage price calculator. For a first-class letter to Canada, the first ounce of postage costs 85 cents, a two-ounce letter costs $1.17 and a three-ounce letter costs $1.49, as of the time of publication.
How much does it cost to mail a letter to Peru from the US? According to the Postage Price Calculator http://ircalc.usps.gov/MailServices.aspx?country=10354&m=1&p=0&o=1 it costs $0.98 cents to mail a 1oz. letter from the U.S. to Peru â¦ .f the letter is an ounce or less, and it is a standard size, then  the cost is a first class stamp (currently $0.44).    Because Puerto Rico is essentially part of th â¦ e US.