Can anyone tell me if these formulas are accurate?

Total time In/Out: =IF(C4< B4, C4+1, C4)-B4

Total time @ end of pay period: =SUM(D4:D18)*24

http://2.bp.blogspot.com/_ki9lLuCTZ9Y/TDNEAuXWkpI/AAAAAAAACjU/cQKpDrvkyyc/s1600/excel+spreadsheet.JPG

If the results work...

They seem to work, but when the other manager calculates it with the calculator, she gets a different answer... but my formula seems accurate. Does it look accurate to you?

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What formula does the manager use? What results does she get, How do they differ. The calcs look OK to me.

You formula technique is sound. The only change I would suggest is your formula in D4 should already convert the time values into decimal values.

In D4 and copied down through D18, then formatted as General:

=(IF(C4< B4, C4+1, C4) - B4) * 24

Then in D19 a simple:

=SUM(D4:D18)