Moving the variances at raw material level to FERT level

Dear experts,

We are having the scenario:

RM Level production Orders

SFG Level production Orders

FG Level Production Orders

When we are trying to close the orders at month end, there is no problem in settlement, but when we see the COPA report variance amount is appearing under the same material for which we have settled the order.

Expectation is, as we are used the RM for SFG and SFG for FG, the RM variance amount should be shown under SFG & SFG variance should be shown under  Finished product.

Is it possible..............?

Thank you...