Zen Cart - Attributes

I have a Zen Cart site under development for last three months. The website is ready, say 95% ready. The attributes module was recently implemented and the site works great. However where I need help is - The site is configured to handle retail and wholesale customers. The attributes feature works great with the retail side. However for the wholesale side it is having issues. It doesnt work for the following reason. Retail customer buys an item, that same item (product) comes in different woods, so it has a base price of say $20 and the attribute feature for retail customer will sell that item in Oak for $10 more markup, in Pine for $11 more, in Alder wood for $13 more. You get the idea. ... Now on the whole sale side, my module allows me to do it but for the same markups. I want that attribute feature to allow my wholesale markups different from retail markups. So when wholesale customers come to the site, I want them to pay $18 base price AND $7 more for Oak, $6 more for Alder,....and so on. Get it? Can you solve the problem? How long will you take and how much will you charge? This is an issue for Zen Cart expert only. I have Zen Cart associates in my office who have intermediate knowledge of Zen Cart. I am looking for someone with an edge. Bid only if you are confident of the issue. We will not pay for your experimentation - only completed jobs. Escrowed payments welcome on satisfactory job completion.