Costing with special procurement

Question

Hi ,
I have bunch of materilals in 2 palnts (Say A,B) two different company ocdes(Say X,Y) , one plant  (B) which is having F/-/aa , where F is Extrenal Proc/Mrp special -/aa is the Costing Special Proc.key pointing Plant "A" as primary plant
I costed these parts in plant "B" without costing the plant "A" , It Didn't Give Any Error Message And Pulled The Plan Price From"A" plant .
I wonder how can plant "B" pull the price from plant " A"  which is not costed. and surprisingly it costed the primary plant  "A" first just 3 seconds before it costed Plant "B "
how can this possible does CK40N allows to carry other plants cost roll for those which are having like F/-/aa kind of master data even we don't specify those plants in CK40N?
I gave only plant B in the selection but not A
Thank you ,
Paarthu
NOTE:
Pattern F/-/-
F--External pro
Spec.Proc. MRP
Spec.Prcu. Costing
aa is the primary procument plant key  Plant "A"

Answer 1

Hi all,
Thank you for your time,
I found this,
Std.SAP allows that if we are doing a cost estimate using the CK40N and (Ex:1 plant ) , but if that plant is having some materilas which are procured from other plants SAY F/-/ab
"ab" IS THE OTHER PLANT called XY,even though you don't mention the plant for "ab" system wil do cost estimate for taht materila in XY plant and will get the cost estimate and will redo for the main plant which we used in selection parameters,
it is true for different entities/CCOD  if they exixt in same Controlling Area.
Thank you ,
Paarthu