adding items in a flash shopping cart

hallo everyone,
I have created a flash website and I want to add a Shop on line made by Flash as well. I have created the structure but I am really stuck with some important issues:

How can I add items to a "Shopping art" in flash?: example : I want to buy a T-shirt size "S" color Blue which cost £10 how can I include all these information in a script for the flash button "Add to Cart" related to the t-shirt.

How can I add diferent Items in the "shopping cart" plus delivery charge?

I saw the shop on line of Nike.com and It is something like this that I meant. Not as complicated as Nike but I would like to know what to learn to get that sort of result.
thank you so much

hi welcome to FK.. u can look at my flash-paypal example in my library..hopefully that can get you started..

thank you so much,
your site is so helpful!! the paypal file is just a part of the problem but it is a wonderful start.
thank you again