Hello.. Greetings From JobTree Consulting Services, Chicago, IL, USA. We have good experience working with Amazon MWS and AWS Api. We have built so many applications for merchants to list, manage their amazon inventory. Please go through our feedback. Here is my plan to complete this project 1. Software will be able connect to Amazon API through MWS. I will be able to connect to multiple amazon Sites. with different Account IDs. As long as the SKUs are same, think there is no need to have relationships. SKUs need to be same for product, only if you are selling them in multiple market places. 2. Inventory information will be downloaded on a scheduled basis/ondemand basis into SQLserver 3. Once the inventory updated in database,user can connect to SQL Server via Excel sheet. 4. Excel sheet will be designed to view and search for multiple or specific SKUs. 5. Depending upon certain parameters,Rows in that excel sheet can be shown red or green. Actually the client application need not be an excel, we can write a Windows based application also depending upon what u request. Please note that we wont bid on every single job we see here in [login to view URL] are only few handpicked projects, we would like to [login to view URL] work is backed up by a 30 day extension period for for fixing any bugs you might notice after you start using the product. We just don''t want to leave our customers with buggy software. Thanks for considering this bid. Please contact me of you have any questions