Desktop Application for keeping Track of Buying and sellling On eBay / Online

Note : For multiple EBay or Online accounts .. Need a Simple Desktop application to Keep track of : 1. Selling Date of Selling , Item Number Items Name Cost Price Selling price Commission paid Listing fee Paid Paid to PayPal Final Amount Received . Sold to : Name and screen name , Address / Phone , Email ,Note . Feedback ( By selling 1 item , inventory reduce by 1 ) 1A. Return & Refund Module for any Item Return by the Buyer. ( adjust inventory ) 2. Buying : Same as above ( applicable for buying ) 3. Customer Adding and Transaction ( Name Address, Phone , Email Etc ) 4. Seller Adding and Transaction 5. Items for selling : Detail and quantity in stock ( on hand ) ( Details:l EBay selling / Online selling ) Inventory updating , ( Adding more items should be easy and # should increase accordingly ) 6. Reports : on [ Report should be viewable on screen and should be printable on letter size 8.5x 11, on window printer. ] Selling ( Date Range ) Buying Customer Seller Items Sold (Detail ) Sale by Screen Name ( ID ) and By employee Total Fee paid to Online (like eBay ) Total fee paid to PayPal or other payment gateway . Total Report : Income, Expense, refund. 7. Activation control ( Company name and activation code generation : Key generator . ) 8. Login and employee . 9. For windows 7 32 / 64 Bits , and for windows 8 (coming soon ) . Program should be installable with setup. 10. Good User Friendly Design with Touch Screen compatibility. Please read the project first and write the word "Understood". Also write your steps and suggestions to complete the project with a short description of what you understood.