I am making a spread sheet that lists meeting times. One line will show the
specific date the next column shows the length of the meeting.

What I would like to do is to have a way to have a formula that will add the
times for the months together.

Example:
Jan-12 75mins
Jan-22 25mins
Feb-1 10mins
Mar-16 15mins
Feb-5 25mins

I want to have it so in another section it will display these results
Jan - 100mins
Feb - 15mins
Mar - 15mins