Need Suggestion on Expense approval requirement

Summary:

We have a business requirements in reference to the Expenses Approvals. Need your suggestions on this requirements. Details are given below. 
Business Case: Business has various types of expenses. Among them there are 3 expense types as below 

1.  Conference and Seminar expenses ( A General Expense type)
2. Entertainment - Client Meetings 
3. IT related expenses 

The approval hierarchy Setups

1. for 'Conference and Seminar expenses' it should follow the approval hierarchy as below.
   1. Level 1 - Supervisory 
   2. Level 2 - Cost center manager
2. For expense type 'Entertainment - Client Meetings' - it should follow multiple level hierarchy as below. 
   1. Level 1 - Supervisory 
   2. Level 2 - Cost center manager