Carlos,
It's tough for anyone but an HVAC person to get those numbers. You can ask your contractor, but good luck even getting a wholesaler to give you a quote on the phone if you don't have an established contractor's account with them. My wife used to work for a plumbing/HVAC supplier, and they set that policy because not all contractors get the same prices- it depends on volume and their track record when it comes to paying the bill, as well as a few intangibles such as ability to schmooze and general manners. She was not allowed to tell members of the general public what the list price on any given product was.
So ulitmately, any number you get here will mean nothing- the contractor you hire may have a better or worse standing with their wholesaler. You can ask the contractor for a copy of the bill from the wholesaler, but you're risking really ticking them off.