HELP! Calculating times

Help Gurus!

I’ve created a log sheet to log contact time of students on tasks. I need to add up/SUM the total time of their activities. This is highlighted in PURPLE.

Row D is a drop down menu of tasks, Columns E – J they need to log their time on these tasks, in 5min increments. This is highlighted in YELLOW.

How do I SUM these times?

There will be times where we will need more then 24hrs as well...

I’ve included the spreadsheet as well.

Thanks,

QueenMab