Calculating time between two timestamps

rfinnegan

Board Regular
Joined
Mar 15, 2005
Messages
172
Hi All:

I'm trying to calculate the average transaction time and need some help.
The data is arranged with the transaction number in column A and the time each item in the transaction was scanned in column B (think supermarket scanner).

For example if I had a transaction with 8 items, the transaction number would repeat 8 times in column A, and there would be 8 separate time stamps in Column B.

I need a way to find the difference between the first time stamp and the last for each transaction number. There's about 50K lines of data and each transaction has between 1 and 40 items.

Thanks in advance
 

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Enter current date or time
Ctrl+: enters current time. Ctrl+; enters current date. Use Ctrl+: Ctrl+; Enter for current date & time.

DanteAmor

Well-known Member
Joined
Dec 3, 2018
Messages
14,190
Office Version
  1. 2007
Platform
  1. Windows
It would be very useful if you explain all the possible cases with examples. In that way we will create a formula that covers all cases.
 
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