Simple Data Processing Job in Excel

I have an Excel file of addresses with several duplicates. You'll need to delete duplicates based on a source priority list I'll provide. Data will be from one of 3 sources as indicated in a "source" column, you will delete duplicates based on source priority. You will deliver back to me one complete master Excel file alphabetized by last name, plus 24 separate files, one for each letter of last name: A through U, W&X + Y&Z. The excel file contains 1123 lines. I am estimating that the final file will be reduced to only 950 lines, thus an estimated 200 duplicates to delete, or less. This is a simple job but I just don't have the time! I am expecting low bids on a project like this. Work will be checked and only highest quality will be accepted.