this says it's $10/hour..
https://www.elance.com/s/mcneilcallcenter/
The $10/hr fee is a starting price.....you can easily negotiate it down. As you know I used to use them prior to 2012.
We were paying an Avg of $3.5/hr to the telemarketer + $1/hr to the call center using our own phone system.....total cost was $5/hr.
So if you order 20/hrs per week, I would bet you could get cost down to $6-7/hr if it is a weekly order.