PHP Amends to OpenCart ecommerce website

We have a "OpenCart" ecommerce website, and need some small changes made to it. These are mostly changes to the admin area: 1. Product Image titles - To be able to change 'Title' of additional images on a product, in order to give them a caption. 2. Shipping - We have setup the "free shipping" module for orders over ?40; but we would also like to have free Fast Shipping for a basket over ?70. 3. Postage / Shipping label - We need a way to print shipping labels from the admin area. (A simple label with the address on it.) You could probably take the invoice code, and trim it down to just print the address part. Let me know your price for these 3 items. We are a web design company, so looking for a OpenCart expert to do regular work for us. Thanks Craig