GR posted for Production order without value

Dear Experts

I have the following scenario:

Step 1: GR posted for semi-finished product (Price control "S") when the value was zero.

Step 2: But on the same day later, Standard cost released for that material and Price variance posted for available stock.

Step 3: Semi-finished product already consumed to an FG and sent to customer.

Step 4: At month end, variance have been calculated for the production order (where GR posted with Zero value). Since no planned cost at the time GR, total actual cost becomes Variance.

Step5: Variance Settled.

Since user's delay in maintaining standard cost in material master, the above scenario happened.

Is there any solution to this issue? (the stock already consumed).

"Price variance posted during standard cost release" and "Variance posted during production order settlement" will get tallied?

If yes, how should I prove that to Client?

Thanks in advance for your answers.

Regards

Bala