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.
1 The median initial retainer fee for an expert witness is $2000. 2  The median hourly fee for file review/preparation for all non-medical expert witnesses is $245. 3  The median hourly fee for file review/preparation for all medical expert witnesses is $350 (43% higher than for non-medical experts).