Hello,
I have used Python for about 4 years for most of my computing needs (data processing, web development, administration scripts, web scraping etc.).
The proposed budget ($250 - $750) seems too much in my opinion. If the desired program is as simple as you suggested it should not take more than 2-3 hours to write; however Freelancer won't let me bid lower.
Please provide more details about the data input (where does the data come from (a file, database, written from the keyboard) and which other statistics are required) and I'm confident I can help you with your task.
Thank you for your time!
Best wishes,
Ionut