I usually work on an hourly basis. You have to take into consideration the amount of work you do. Don't sell yourself short. Calculate how many hours you had to put into the graphics, html and other things. Did you have to create the content on your own? If so, you should charge for that.
Usually, I go by the following, in us dollars.
graphics: $20 - 35 per hour.
html writting: $25 per hour
java/php/cgi, etc: 35+ per hour.
Also keep in mind that a lot of time is spent coming up with ideas and putting the ideas on paper. This is what i call Creative Thought Process time. I usually go by about $20 Per hour with that.
Also keep in mind that the tools you use cost money, and you need to incorperate some of that into the price.
I hope i helped, although i can not give a direct estimate as i dont know the answers to the above.