This should be pretty straight forward.
1. Load your data (Excel workbook)
2. Select your data sheet
3. In the Tableau worksheet -> Drag Region into Rows (If you need the count by Region Level); Else drag Division into Rows (If you need the count by Division level)
4. Next drag Models next to Region
5. Drag Number of Records to Text (You can also double click on number of records)
You should get what you are looking for.