Creating Approval workflow for refunds in Receivables

We have a business requirement where, when creating a ‘refund’ the maximum amount of the refund is limited to the person’s max approval limit. So, for example, if Person A need to refund $10k and have maximum approval limit of only $2.5k, it creates refund up to $2.5k only, instead of the full $10k and routing to the next level approver.

We would like Oracle to accept the amount of the refund request, and then route it to the person who has the next higher approval authority.

There is a feasibility of fulfilling this requirement by using Application Composer but we are unable to find any document relating to this.