Really Novice Question

[AccessNoob1]

I am trying to get my text box to store in a tables field named [Totals]
but i can't seem to figure out why it isn't storing or how i can get it too.




I currently have this in the control source

=IIf([W]=True,0,[Cost]*10)

What would i add to make it store in [Totals]?

[RuralGuy]

Maybe this link will help: http://allenbrowne.com/casu-14.html