Pricing for PHP programming???

I know this is not really a PHP question, but it should make for a good thread. :) I was wondering what other PHP people charge to write PHP? I have just been given a project for a fairly large customer, much larger than I normally do work for. So I am VERY confused.concerned about how to price it. Most of my other PHP projects have been done for small single owners businesses, and the PHP has been pretty basic. Now that I can actually do what I am being asked without have to learn it, I am stuck. I did a shopping cart for someone, but I didn't charge them a REAL price because I didn't know how to do it with PHP. So, I of course didn't charge the client for my learning curve. I know the price is very dependant upon the task. What I am doing is creating a web-based front-end for a MySQL database. I'll need to create the database tables, etc. The front-end is going to be rather dynamic since the data content depends largely on the previous choices of the end-user. One or two tables with 20-30 fields. 5-6 pages of html and PHP. I'm just scouting this out, and am VERY confident with the contributors to this list and their opinions. TIA, Shane