How to handle B2 (Setup) variance when work order quantity differs from accounting cost quantity?

We have a item branch record with accounting cost quantity 2500 TH. We created work order with quantity 360 TH. When we completed work order and ran manufacturing accounting, we are getting variance in B2 (difference between standard and completed amount).

I have referred all oracle docs and found that this is how system is going to behave when work order quantity is not equals to the accounting cost quantity. Is there any way to handle this variance?

Regards,

Ulhas