Build a Magento Online Store using data supplied by Supplier in MySQL

We have a fully up and running magenta webstore. Our supplier has given us a complete database dump of their site [login to view URL] We wish to import all the product from this MySQL dataset into our site, to include all data from SKU, colour, size, description, fabric, images etc. Our webstore is at [login to view URL] we will require this work to be done on our development mirrored site and then when it is proven to be working to re-run the data into our new site. All pricing when imported must be as wholesale price, then we wish to increase the price by a fixed percentage for the retail price. To get this contract you MUST tell me how you intend to do the work, eq write a query, create an export, use a plain etc, there is no point in just saying I can get this done as we don't have the time to have people trying to work this out, there are about 3000 items which with the variations of size and colours equals about 90,000 lines of data. We will not accept any bids where you cannot explain your process that you will do for us, we need to do this at least twice a year and are looking for a developer who can do this each time the data changes, drop all the previous data and bring in the new data.