Business Startup Operational Expenses Spreadsheet

I'm in need of an organized, comprehensive spreadsheet to track the operational expenses for my startup. The spreadsheet should categorize expenses by department, specifically Marketing, R&D, and Sales, as well as other direct expenses, bank charges, and product stock.

Ideal Skills and Experience:
- Proficiency in Excel or Google Sheets
- Experience in creating business expense spreadsheets
- Ability to categorize data effectively
- Attention to detail
- Understanding of startup operational expenses