I am learning about this in My CST 100-02 class from NVCC Annadale campus. I had very little knowledge of ethos, pathos, and logos prior to taking this class. I believe that is it very importan to have all three ethos, pathos, and logos while giving a speech on pursuasion.
So, how much does a contractor cost, anywhere from 5% to 25% of the total project cost, with the average ranging 10-15%.ypically the contractor' s crew will be general carpentry trades people, some who may have more specialized skills. Exactly how a general contractor charges for a project depends on the type of contract you agree to. There are three common types of cost contracts, fixed price, time & materials and cost plus a fee.
1 Built-up roofing costs $3.50 to $7.00 per square foot installed.  Masonry roofs typically cost $2 to $4 per square foot installed, but can be slightly more expensive depending on the price of concrete at the time of installation.