Bulk Geocoding Excel File

Hi, I have 2 excel files which equate to just over 600,000 records. On each row there is an Australian Address. I just need the longitude and latitude for every address on a separate column. Preferably a longitude and a latitude column which are separate. Due to the large amount of records, I do not have time do myself however I will be needing them very urgently. Price pretty much dictates this project and I need them urgently. Please, in your bid tell me how many hours it will take you from the time of bidding. If the timeframe is suitable, than I will award today. Thanks, Brian