Ok, so before I ask the question, I am a newbie. i have designed sites for about 10 years on a personal level using only html and photoshop... more of a graphic designer than web designer. I decided to get into web design more so been learning css for about a week and a half now. Getting pretty comfortable with it. But in talking to some friends about a problem I have they suggested jQuery, and it's blowing my mind!

The closet thing to what I need is a shopping cart, i currently don't need it to submit anything, I just want it to calculate. we may want that in the future, but i just need it to get working, don't want to mess with learning a db right now. I need users to be able to make selections and then have a price displayed instantly updating everytime they make a selection, and then I need the user to be able to type in a quantity and it update based on that, and then what i am assuming to be the (crappy, difficult, lots of code) part, I need it to change prices of things based on the quantity. Such as if I want 100 of product a then it's $1.00, if I want 1000 it's $.050.

thanks in advance for all your help.