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.
If your sending letters to people all over the country, your postage cost will be between 21 cents each and 27 cents each. These bulk mail rates are for letter size mail (up to 6.125 x 11.5 landscape only, if you turn it into a portrait orientation it becomes a flat and your postage will increase).
1 Home > Ship & Postage. 2  Effective January 22, 2017 the cost of a first class (1) ounce letter sent through the United States Post Office increased two cents from $0.47 to $0.49 for letters mailed within the United States. Reversing the $0.2 price drop from $0.49 to $0.47 effective April 10, 2016.