Date Subtract

[raburger]

Hi,

I need help. I want to subtract 2 columns from each other (Dates) but the cells need to be checked fist if blank and if blank it should ignore the one or use Today() in the other.

Example below. Row 4 and 5 work but row 6 gives me a 43027 value that should be a blank as I get the average delay in T so a 0 cant be entered if both cells are empty.

	N	O	P	Q	R	S	T
1	Rev	Sub Date	App	APP Wc	Rej	Resp Date	Review Delay
4	a	20/01/2017	1			28/01/2017	=IF(T4="",TODAY()-O4,T4-O4)
5	a	23/01/2017					=IF(T5="",TODAY()-O5,T5-O5)
6	a						=IF(T6="",TODAY()-O6,T6-O6)

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[Legacy 143009]

Totally confused?!How could you possibly referance to the source cell on the first hand?

 

[Aladin Akyurek]

The formula in T4 must probably refer to S4, not to T4... If this is right:

In T4 enter an copy down...

=IF(O4="","",IF(ISNUMBER(S4),S4-O4,TODAY()-O4))