Roofing Square Explained. The term roofing square and roof pitch are the most commonly used terms in the roofing industry. 1 roofing square = 100 square feet. It does not matter how you arrive at 100 square feet. 10 feet x 10 feet = 100 square feet or 1 roofing square. 5 feet x 20 feet = 100 square feet or 1 roofing square.
How much does it cost to produce 1 gallon of ethanol?It will cost about $1.10 to $1.20/gal to make the alcohol from various feed-stocks like corn, barley, potatoes, or Jerusalem artichokes. You will also have by-products which you can sell or use as animal feed, reducing the total cost down to about $.95/gal.. If you do this on a large enough scale, it will cost anywhere form $0.95/gallon to $1.40/gal to make the alcohol, depending on your feedstock. Look at my web pages, Mashing and Fermentation and also,  Molasses and Rum .
If we assume a standard 1.5-ounce shot, that means you get 22.5 Stoli-and-whatevers per bottle, for a price of $1.22 per serving. The bar charges $6.75 per dose, so when dealing with Russians or other masochists, the liquor cost is a mere 18 percent. But most people don't drink shots of vodka. All the other crap that goes into a standard mixed drinkâsoda, ice, straws, lime wedgesâis cheap for the bar but free to the consumer.