Mileage contest using Gravity Forms and showing results on page

I have a form set up that collects the user name (populated in a dropdown) and a number field that will be used to collect mileage (1 mile or 4.6 miles). I need to display these entries on a page, but each time a user fills out the form, it needs to add their mileage to their previous entries and display a total mileage on the page (for that single user). Each user should only be displayed on the page once (not for each entry they have submitted). It would be nice to have the totals sorted as well. Think of it as a contest to show who has traveled the most miles and would be updated each time a user submits a new entry. I can style everything, I just need the totaled entries for each user displayed on the page and sorted.

Can be done pretty easily, quick job. Can you send me an e-mail please at gennady[at]kovshenin[dot]com?

Hello Gennady,
I have gone through your details and would be glad to assist you.
Please email me at anna(dot)cis23(at)gmail(dot)com or S-K-Y-P-E:cis(dot)am2 for formal estimate.
Best Regards,
Anna J