Thanks Jerry and Adam, those are what I was looking for, although
maybe not the solution I was looking for :)
My site is hosted on one of Network Solutions Unix servers. I generate
web pages using software I wrote locally, then upload static pages to
the site, namely http://www.plantsthatproduce.com/products/. Naively,
I am hoping that I could
(1) add "add-to-cart" buttons to my product pages
(2) put some ready-made software in cgi-bin (o.k., maybe I need to
change the merchant information)
and have a working shopping cart for my customers, that among other
things helps me with the freight-calculation problem.
Where might I find such solutions?
Thanks as always,
Richard