Form Time format in Field Properties in Acrobat Pro DC

I hope someone can help and it may be simple solution. I have created a simple input form in Acrobat Pro. This form is for keeping a score and time within a competition. The first column has the score of the event and the second column has the time. 3rd column the score of the 2nd event and the time of the 2nd event. There are 4 events in all. So there are 4 scoring fields per line and 4 timing fields per line.

My problem is I would like to show the 4 timing fields in minutes:seconds:milliseconds format.
I have tried to go into the Text Field Properties>Format>Custom, with the custom put in the format mm:ss.00 and that does not work. How can I have a person enter in the format of the field, minutes:seconds:milliseconds. As someone will be entering in the time as the event happens.
In the 5th column I would like to total all 4 previous time columns if that is possible.

Thanks