I found this:
admin->modules->order total->shipping
However this only enable free shipping for orders more than $XX

I was wondering...
Can I set zen cart to offer free shipping only on an order total above a certain amount and only for certain items?

For example:
My store sells product A - Z.
Offer free shipping for order over $300.00
However, I don't want to apply for this free shipping offer for product E, H, K, and Z.

Is there a way?
Thank you in advance!