Magento Google Shopping API + Google Checkout Fix

Hello, We require a freelancer to work on three projects for our Magento site. 1) Google Shopping API FIX We are currently using the magento Google Content API extension to load our products into google merchant, the extension has a problem whereby when you want to synchronise the products it does not extend the expiry date on google merchant. We need a developer to fix this 2) Google Shopping Price Comparison Script We need to develop PHP script which will connect to the Google Shopping API (I believe there is base code available on google code) and will search the SKU numbers we have live on Google Shopping (these are submitted via magento google shopping API and held in a SQL db) and return the best price, it will need to search comparison table as well the standard listings. The best prices then need to be written as an attribute on the product SKU in the magento database. Experience with magento and Google APIs is a must. The prices returned need to be 100% 3) We have a problem with google check out in magento where the correct shipping rate is not being parsed from magento onto google shopping, we need this fixed (please note the shipping needs to be calculated on the magento end and not in google checkout) We have worked with a freelancer before who has taken on the project confident he can complete the work however they did not possess the capabilities to complete the work to an adequate standard, please only bid on the project if you are 100% confident you can complete the work on time. We are looking for bids in the $200 - $400 region. Many Thanks and happy bidding! Ben