Add the discounts and charges by editing the cart. Do one at a time. Start with the discount. Then add the insurance. Then add the tax.
If you want help then we could do this for you in a premium support ticket.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.