Invoice Approval Workflow - Exception to Job level hierarchy

Summary:

We need to add exception to particular Job level in Job level hierarchy Invoice approval. One person in same Job level can approve higher amount invoices. Please suggest how to achieve this.

Content (please ensure you mask any confidential information):

We are setting up Job level hierarchy by giving job range. let say as below:

Job Rage Starting Approver Invoice Amount

5 Manager of Invoice requester less than 4000

5-6 Manager of Invoice requester 4000 to 25000

5-7 Manager of Invoice requester 25000 to 50000

5-8 Manager of invoice requester 50000 to 100000

If Job level 6 has two persons A and B. We want to add exception that B can approve till 50000 even he is having same job level 6. If need more information then let us know.