replace member values while saving

Dear Experts,

I got a requirement that I need to replace the data while saving

for example

Account,Entity,Audittail, Category,Time,ProfitCenter,CostCenter,Value

Row - Account, Audit trail

Column - Time, Category

assume everything else is a context

In my input template, i insert for example

Account,Entity,Audittail,Category,Time,ProfitCenter,CostCenter,Value

1001,Chicago,RBN,2014.02, plan, PC_1, NO_CC, 25

1001,Chicago,RBN2,2014.02, plan, PC_1, NO_CC, 25

when I click "Save Data" i would like it to save like:

Account,Entity,Audittail,Category,Time,ProfitCenter,CostCenter,Value

1001,Chicago,RBN,2014.02, plan, PC_1, CC_1, 25

1001,Chicago,RBN2,2014.02, plan, PC_1, CC_2, 25

(logic, if Auditrail is RBN, then it is store in cube Costcenter CC_1, if RBN2 then CC2)

The reason why i'm asking this is the context is NO_CC for CostCenter, and I dont want to user make select one by one, I want it save in the background.

it is possible to do this?

Thanks

Regards