Expense Management & Cost Control System.

### Input
Business size, expense volume, pain point

### Task
Design the expense management policy. Define: expense categories and sub-categories (travel, meals, software, marketing, office supplies, training), per-category spending limits (daily meal limit, hotel limit per city tier, flight class allowed), pre-approval requirements (any expense above IX needs approval from whom), the reimbursement timeline (submitted by when, paid by when), and the receipt/documentation requirement for each category.

### Output
Expense policy: categories + limits per category + approval matrix + reimbursement timeline + documentation requirements