Is Movement type-201 allowed Material values to en

Is Movement type-201 allowed Material values to enHi friends,I have a different scenario.During posting of Materials to cost centre normally we allowed to enter qty,cost center.As per my present requirement I want to enter the value of the material for that particular posting only.Is it possible to do in SAP?Q1.after PO or STO ,during GR / GI,is it possible to enter the value of the materials in MIGO or not?Q2.I know that MIGO GI Movement type 201 allow me to enter cost centre and the material quantity only.Using TC = OMBW / OMWB in the field status activation,Can we activate value field ,so that I can enter value of the material.Is SAP have such facility?Q3.As per my knowledge,during PO stage and Invoice verification stage only we can do the price /value updating.During GR/GI stage we cannot do Value / Price updating.Correct me if I am wrong.Pls help me.Thanks in advance.Eswar.