Another IF challange.

I have the following formula (shematic):

A + B + 0,57C + D - 0,5r - 2,57d

Got the formula working nicely, even with the follwing incorporated

If C = 400 add 2d

This is what it looks like:

=Sheet1!M3+Sheet1!N3+0.57*Sheet1!O3+Sheet1!P3-0.5*INDEX(Sheet3!$A$4:$K$6,MATCH(Sheet1!E3,Sheet3! $A$4:$A$6,0),MATCH(Sheet1!F3,Sheet3!$A$4:$K$4,0))-2.57*Sheet1!F3+IF(Sheet1!O3=400,2*Sheet1!F3,0)

Yeah! But I want to incorparate another IF or other solution for the
following:

Value C = 4r

IF(Sheet1!O3=4*"r",value_if_true,"invalid C")

How do I tell excel, when the If is valid to continue with the function
above, when not true it will write invalid C (or whatever fits the
cell)

Thanks


--
willemeulen

Blink1 *Willem van der Meulen* BSc Soil & Water Eng (Netherlands)
------------------------------------------------------------------------
willemeulen's Profile: http://www.thecodecage.com/forumz/member.php?userid=285
View this thread: http://www.thecodecage.com/forumz/sh...ad.php?t=98322