Hi.
I'd appreciate it if some kind soul out there can work out a formula for me.
I've spent weeks trying to fathom one out but all I do is end up pulling my
hair out.
Ok I need a formula that will do the following:-

24hr clock times between and column C to calculate total hours

Column A Column B Column C
18.00 20.00 2
05.15 07.30 2.25
21.00 02.00 5
10.30 11.15 0.75
06.00 18.00 12
etc.etc.etc.

I'd appreciate any help that will help me solve the problem

Thanks in anticipation

Dick Smith