1. What is the intended use? Advertising? Corporate literature? They just want a big print to hang in the office?
2. Exclusive for how long? Exclusive for 1 year? 5 years? Forever?
3. How many copies of this print will be in circulation?
4. Do they want internet rights or just print?
Get the print copyrighted ASAP. Its not uncommon for a company to ask first, refuse to pay, and then use the image anyway. IF they tell you "NO" keep a close eye on the company website and literature.
What you charge is up to you and how they will use your image. If nothing else charge enough to buy
fotoBiz ? Photography Business Management Software then you can use the pricing software as a guide on future opportunities.