Requirement-Combination of Approval Group and with in that Supervisory Approval for Expense Reports

Summary:

We have the requirement of sending the expense reports to be routed to multiple levels of approvals as follows -

1. Supervisory Approval (Mandatory Step irrespective of the amount)
2. Approval Groups (based on the authorized approval limits) Ex: Group 1 for amount < 1K USD, Group 2 for amount 1K to 5K USD, Group 3 for amount between 5K to 10K USD, Group 4 for amount between 10K USD to 20K USD, Group 5 for amount between 20K to 50K USD, Group 6 for amount between 50K to 100K USD, Group 7 for amount > 100K USD.
3. The trickiest part is here -

a. If the approver himself / herself is the submitter of expense report, and the amount limit is within their approval limit, then the second level of approval should be skipped and auto approved.