Latest version of Zen Cart. I have 6 different items. I would like to set up categories with a fixed amount of purchases for each category. i.e.,

Category 1 - 3 items - Fixed Price for the category - shipping and handling extra fixed cost - customer can mix and match or buy 3 of one item.

Category 2 - 6 items - Fixed Price for the category - shipping and handling included - customer can mix and match or buy 3 of one item.

And so one with a total of 8 categories. Category 2 - 8 include free shipping and handling.

Difficult scenario to search for when you are a relative beginner. Any help is greatly appreciated.

Thanks,

Jack