Calculate start and end time

Hi,

I have a batch file to execute another batch file. I want to calculate the start time - end time to give a total time that the process took.

This is my Batch:

@ECHO OFF
ECHO %DATE%
ECHO THE PDF WILL OPEN WHEN PROCESSING IS COMPLETED.
ECHO TRANSFORMING STARTED...
set starttime=%time%
ECHO STARTED: %starttime%
Sandbox-Fo.bat >output.txt 2>&1 & ECHO FINISH DEBUGGING, PRESS ANY KEY TO EXIT & pause & start foo.pdf

How can I do this?

Thanks

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