Is actualcost field in stockmaster obsolete?

[PakRicard]

Just returning to this old topic... In my search for DB optimization, I plan to use actualcost as a PERSISTENT field = stockmaster.materialcost+stockmaster.labourcost+stockmaster.overheadcost to save the hundreds of sums that have to be done, as all over webERP stockmaster.materialcost+stockmaster.labourcost+stockmaster.overheadcost is found and recalculated.
Other than that... actualcost is only used in SalesInquiry.php retuning always 0 as it is never populated ;-)