Admin Data Entry Needed

I need some to add product sizes through my shopping carts admin to three sites. Adding the sizes are pretty simple, all you have to do is click two choices per item and it automatically does the sizing. There are about 1800 products per site, I don't anyone to rush but I do need the job completed asap. One of the site however is a rush job and I require you to complete that within 12 hours period, no complaints, no excuses. The other two you can do at a timely paste, however I do not want anyone to sit on the project for more than 4 days. I did one site prior to posting this and it took me less than 4 hours to complete, so I know the work load first hand. Please bid fair and a time that is proficient for me. Thank you for your time.