Comprehensive Marketing Inc. Industrial Source Incorporated prey on the unemployed Lombard, Illinois

Comprehensive Marketing sent me a check for $3,780.00.  They congratulated me for the application I had submitted for a customer service position.  I am seeking employment so the check was tempting.  I read the letter which said I would get $200/hr for a 2hr "try-out" training assignment = $400.  I was instructed to call 1-866-439-0576 to activate the check I was to deposit into my bank account.  I was supposed to use the remaining $3,380 to pay a western union fee and send funds (not sure where...never called).  The letter gave a little evaluation about the western union ...courteous? professional? etc...  They also requested I fax over  a weekly schedule of my available hours on a form that was not included.  I called KMART, the suggested western union location, and was suprised to hear KMART did have a western union but they advised me not to cash the check or send the wire that may give Comprehensive Inc. access to my account.   The envelope was postmarked from 90 Burnhamthorpe Road West, Mississauga, Ontario L5B3C3 and the letterhead said 11250 E. Colonial Dr. Orlando, FL.  Their Website seems quickly thrown together giving Illinios and Indiana offices.  The suntrust/miami account the check was written on was from the Florida Educational Credit Union.  Nothing adds up and I believe the Marketeers are just preying on the US unemployed for victims.