I have time sheets that people fill out and and calculate by hand. I would
like to insert a formula that will calculate the hours and minutes worked.
An example would be:

Time In Time Out Time In Time Out # Hours
8am 11am 12pm 5:30pm 8.5


It would be even better if I could get "8 Hours and 30 Minutes" instead of
just "8.5." I'm thinking the only way to do this would be to use army time
because the am or pm will just get in the way of the calculation, but if it
is possible to leave that would be great as well.

Thanks in advance for any assistance! Let me know if there is any
additional information needed.