Today's pc's are cheaper then ever. It is not difficult to get a pc for less then $500 these days. These workers don't need the latest and greatest to read database entries off a webpage, ever a 200MHz box would work fine for that (ie: used equipment).
Allowing for NEW equipment would only increase the FIXED costs about $30,000... allowing for desks (no fancy cubes here.. $200 ea), an additional $12,000. Even the automated servers are not very expensive. Figure an additional 30 machines (callers determine which sound file they hear).. increases the fixed cost about $15,000. These costs run about $57,000 total. Allowing for unseens... increase that to $100,000. Then add office space in some warehouse district for less then $8/sq ft and go for about 2,000 sq ft, and you'd have about $1,333/month rent. These are all costs based on US numbers, not Mexican or Indian.
How about the cost of labor? With the minimum wage at what - $35 an hour - how does that compete with India?