How do I get a calculated field ina report to copy to a table feild

[joet7878]

As an example I have 3 feilds on a form, the form feilds are from a table i have made.
One feild is money in , the other is money out and the third is difference.

I can quite easily calculate these feilds to give me an answer in a fourth feild but I want the anser to sit in the table field difference...

How do I do this ...

 

[judgehopkins]

Fellow newbie, read

http://www.experts-exchange.com/Databases/MS_Access/Q_20630188.html#8607304

and

thread181-580531

They made sense to me! I might reiterate that, unless there is a reason that I do not know, you don't want "difference" in a table.

"The potentialities of a language are so vast that we must wonder sometimes at ourselves: how do we manage to know so much?" Anthony Burgess, A Mouthful of Air