Converting time values from AM to PM

This looks to be working perfectly.

Thanks, I wasn't aware of that!

Is there a way to allow someone to enter 3:00 and it automatically puts it to PM? I am trying to do time and am having the hardest time trying to get the time to work and calculate correctly
I put in 8:00, 1:00, 2:00 and 5:00 during the day and it should total 8 hours.

What I need is for when I type 8:00 it comes up AM and when I type other numbers they come up PM and then I need to have it total.

Please help so when I set this up my child can use it with ease.

Thank you