I want to apply discount on shipping rate. For example if cart subtotal is greater than $125 then there will be a discount of $17 on the shipping cost. I have created shipping cart rule in admin but the rule gets applied on the cart subtotal, not on the shipping cost. I have selected the options "apply to shipping amount" as yes and "Stop Further Rules Processing" as no.
Do anybody have idea about how I can do this. Any help will really be appreciated.
Thanks in advance.