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.
Compare this with my cost of $625 (out-of-pocket expense) and 10 legal hours (X $375 or $3,750), or a total of about $2,400, about 2% of the cost of the 1st-Class Deposition.