Pricing is done on a per job basis. Generally work is priced at an hourly rate or priced per item, sometimes both depending on the project and scope of work to be involved.
Finding out exactly what work they're seeking to have done, where they are located, and the time frame in which they want it completed.
I've had education and training in the I.B.E.W.'s apprenticeship program, Atlanta Technical College, and Dekalb Technical College.