Difference between two times - thank you!!

Hello everyone

I would really appreciate your help

I have a client who weants to work out the total number of hours (not minutes) between two times. I have managed to do that with no problem using the formula =IF(A2>B2,B2-A2+1,A2+B2). However, this is where the problem starts.

They want to multiply the number of hours with the number of men on the job, but the answer is wrong, and I cannot understand why. I have checked the formnat of the cell and changed it to see if that is the problem, but without success.

I have copied it below

Time in Time out No hours No of Men Total Man Hours
12:00 03:00 15 2 6
14:00 18:00 4 7 4


Any help would be really apprciated

Thank you
Lynne