We have zen-cart 1.3.5 and have many broken additions. They were coded into the site by another freelancer and for no reason they no longer work. We have had some of these fixed before and the error was spaces in the code I believe. Below is a list of what needs fixed.
1. Cart no longer pulls Fedex Freight as a shipping Option. It also needs to pull the correct quote when its working based off our account and discounts.
2. When ordering specific items, such as an item with a specific attribute, it is only supposed to allow freight shipping option. For some reason it stopped triggering this.
3. Canada can not order online. They used to be able to. We had a coder add a "broker" field where they were forced to enter broker information before they could check out. Now they get stuck in a checkout loop.
4. When adding any product to the cart from the Sale Items section, disable free shipping. This used to work also.
5. When ordering out of the Panel Category, only allow freight shipping.