I am working with a very strict design for a client that is seeking to enable certain functionality in WordPress that I am unsure of how to handle.
Here is the deal: this site will only host a single product and that product will have four different sizes. The client wants the 'Add to Cart' functionality to be almost exactly like the one found here: http://www.teefury.com
The solution also has to integrate neatly with PayPal as the only payment option. From here you might suggest just uploading a cart through PayPal, but the client wants the site to also be able to track inventory.
In summary, I need an eCommerce / WordPress solution that will give me the developer the ability to add multiple items at a time to the shoppping cart, then immediately redirect the user to PayPal all the while managing inventory.
Suggestions?