Their purpose is to implement Boolean Logic. You might notice the correspondence to Binary Semantics and thus Binary (number system) logic & mathematics. Special fun: OR and XOR (exclusive OR).
Geographical Considerations: While most contractors will price their asphalt shingles roof replacement services within $4.00 to to $7.00 per square foot or $400 to $700 per square range, there will be significant geographic variations.
However, we can look at the formula used in our calculator to see how much an average roof would cost. Cost of roofing materials and accessories: 1 square of Lifetime or formerly known as â30 yearsâ architectural asphalt shingles is about $100.nderlayment and accessories cost another $40-50 / square. Dump fees can range from $30-100 per ton (2000 lbs.) depending on where you live. 1 square of 1 layer of shingles weighs ~ 250 lbs., or 8 squares per ton. a 15 sq. roof is about 2 tons for one layer to be removed.