As a follow up. I want to charge a flat rate for shipping below $200.
I turned on flat rate shipping only. I have a minimum ship charge set (for order totals below $200) in the admin>shipping-quote config area along with flat rate/orders checked.
I go to workflow_ng. From your above reply, I should see uc-quote in the event column of workflow_ng, I only see uc_flatrate. I added a condition to workflow_ng in trying to offer free shipping over a certain order balance. In setting up the workflow_ng conditions, I have check the order balance AND Numeric Comparison greater than $200. Action update the order status.

Where do I tell it to make shipping $0 if over $200 ? Very confusing.
Do I need to code that into uc_quote? Thanks.