In Califonia cause of the ST Andreys fault line where the PACIFIC PLATE and the NORTH AMERICAN PLATE slide pass each other.
Thus, my ballpark estimated cost (basically for the AT&T conference call, $50 witness fee, $150 process server's fee; $400 deposition transcript, $25 for copying costs, and about 10 hours of legal work amount to a grand estimated total of about $625 plus 10 hours of legal work.
A deposition can be as short as fifteen minutes or a long as a week or more for a heavily involved witness. All depositions are very serious matters. What is said at a deposition is very important. The deponent should listen to the questions carefully and be precise in his or her answers.