The total amount is not automatically calculated when triggered by a price change

Dear Experts,

Is determination a mounting that volition forestall the full terms from changing erstwhile the terms is changed?

--Scenario

The terms of the acquisition bid which is added antecedently is changed.

--Expected behavior:

Total Amount is re-calculated automatically erstwhile the terms is changed.

--Actual behavior:

Total Amount is not re-calculated.

Thank you and Best Regards,

Satoshi