What is a roofing square? Essentially it is 100 square feet or a 10Ã10â² block. Because roofs, siding and other big projects are â¦ well, big, using a square foot as a unit of measurement gets complicated. Also, roofing and siding are a commodity now days, so even if you are off by a few sq. feet, it is fine. Itâs not marble flooring, where each tile costs $20 + installation, and when you are off by 30 sq. feet, you can be down $1000.
You get up to 3.3 ounces for standard rate mail! First class mail postage cost is calculated by the ounce so be careful to check the weight first. If you are sending flats standard rate, your postage cost will be about 34 cents to 49 cents per piece depending on your list.
Comments (7). The United States Postal Service increased its rates for first class postage and related services (like insurance) on Jan. 27, 2013. The price of a first class Forever stamp increased to 46 cents from 45 cents. The cost to mail a first class letter is 46 cents for up to one ounce, and each additional ounce adds 20 cents.