Age() calculation question

I have two timestamps -- start and end. I use age(end,start)
to give me a "session" time and then I subtotal those. If
the total times are less than 24 hours I get a time is the
format of XX:xx:xx -- this is great. But if the time is over
24 hours I get 1 day XX:xx:xx, which really raises hell with
my export to Excel. Any suggestions on how to avoid this
little snag?

Thanks for your help.

Bob Lee
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