Similar to a job I've recently done; this requires your hourly fee for the shoot, any materials you use, plus the license to sell on the photographs that they use.
Identify with the client.
What do they need?
What do you need?
Take your half of what you need and multiply by 10-20 (just kidding).
Questions to ask:
What is your budget for this project?
How many copies are you planning to put out of this brochure?
How big of an image do they want?
What kind of photo-usage rights (I call them Licensing rights, though not many seem to either so best to go with both) would you like on the images?
-if they dont know, like my client didn't, then refer back to this thread-
Determine what is your hourly rate.
Determine how much it is going to cost you to do what they ask and your materials fee including the time it takes, in hours, of how much time you require to do processing, burn cds, contract people, etc.
Make sure to include, again, how much time it takes you to do what you say you're going to do.
Recently I had 100 DVD slideshows to fill out and estimated it would take me 10 minutes per DVD...wrong...don't do what I do and make adjustments on the fly; if you don't know then get some concrete information (ie; ask on here "How long does it take to burn a DVD slideshow of 20 mbs of info?) before making any promises, especially in contract). But I learn best from mistakes...so moving on.
Once you have determined their needs and your needs, then you need to figure out what to charge for the license/usage rights of the image. This varies tremendously and to my knowledge there is no set calculation but if you go to this website that I have had positive experience before with, in the past with companies:
In your case you would want to go to "Advertising">Brochure>size of image>distribution>okay
Ballpark figure comes up..and you decide, based on that, what is best for you and your client to match their budget and yours.
Another good one, I'm told by another pro-photographer is:
But it requires you to pay a bit at first, and I'm not sure how good it is but he says it's the best so, give it a look.
Do up a contract with them and get their signature or some form of letter from the company that says they've hired you to do X amount of work for X $$$.
I hope this helped!