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 .
It varies, but $5 to $12 per hour, depending upon location, plus tips. Tips can range from $30- $150 per shift. It's not uncommon for bartenders to go home with $300 - $500. You are correct.. Poured my first shot 1977, still pouring whiskey... Bartender Fraternity name the sperm Whale. it depend on where you work but you make atleast 250 a night and 500 on a busy night.