Remove all charges except tax when subtotal in cart is above $100
I offer free shipping charges to my customers that order over $100. I don't use the shipping calculator in eCart because it doesn't suit the purposes of what I ship, so I have setup individual rules for almost every scenario to cover the shipping charges. What I want to do is remove all of those charges when the SubTotal of the cart is $100 or more. All except Sales tax in california.
Is there a way to do this?