sales order vs costing variant

hi

in production order ,in OKKN we take costing variant for standard cost estimate and calculate in CK11N and released then is updated in order CO01 through costing variant in OPL1 here we select 2 costing variant PLAN and ACTUAL. ok

for sales order in VA01we will calculate costing in menu -extra- costing--

1. is it standard cost estimate like CK11N,

2.while creating CO08 for sales order here we enter production order type PP01, in this order type already costing variant PLAN and ACTUAL would have assigned for oder type

so how it calculate plan and actual

or

first we have to configure all production order setting upto CO01 and after taking production order goods receipt then we we have to create sales order setting like requirement class,type,VA01 and CO08.

plz tell me sequence for sales related order

thank you

sowmya