How to Validate Child Invoice Total Cost to Matched Shipment Total Cost?

Dear All,

I am creating Parent Invoice and Child Invoice from Integration. Approval process can take place on Parent Invoice total cost with sum of child invoice matched shipments cost. But, I also wanted to validate Child Invoice Cost with Matched Shipment total cost. Could you please advise whether this can be possible? I knew we can use Line Approval Tolerances,but it validates each child invoice line to each shipment cost line.

After parent invoice is approved, i would like to validate each child invoice total cost = matched shipment total cost the reason as per below example.

Positive Scenario: