You need to update the Store Cart Summary and Store Cart Details server behaviors on the confirm page. You need to go through each field type to text from number where applicable.
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.