Supervisor Hierarchy Approvals in Purchase Orders

Content

Do anyone know if we can have only one Supervisor approver and the minimum level for approving the purchase order is Director and Above. 

Rules are based on Dollar Amount. For Example: if the Dollar Amount >10000 and <100000 director can approve it and above that VP has to approve it.

In approval rules I see there is option to include First and Last Approver but we are looking for only first approver and minimum level is director.

Any Suggestions

Version

Oracle Fusion 13, 19B