hours breakdown, Ordinary, O/time 1.5 and O/Time 2.0

Hi Guys and girls!

Hoping you maybe able to assist me in a formula breakdown.
I have asked a few work colleges and we can not seem to find the answer.

What I am needing is a formula to help shift the hours in the correct columns.

Attached for example.

As you can see I need a formula/s which will work out the ordinary, O/T 1.5 and O/T 2 by only putting in information to start and finish time. I am not sure if this is achievable or maybe i am asking excel to do a little too much?
Any help is greatly appreciated, I am a bit of a "noob" at excel!.