you must be familiar with interspire shopping cart in order to finish this.
i have a wholesale online store, and i need someone to modify ISC to enable customer order different quantities of product variations on one product page without click "add to cart" and go back again and again...
for example, for a T-shirt product, customer can order 5 M size, 2 X size, 6 XXL size like this:
customer will only need to fill the number and click "add to cart" button, this make things much easier for buyers.
this job need to be done asap, sooner the better.