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 .
So how much alcohol is too much? Well, that depends on who you are and how you define too much.. Statistically, Americans drank an average of 2.31 gallons of ethyl alcohol per person in 2007. That's equal to about 50 gallons of beer, 20 gallons of wine, or five gallons of liquor each.