Ive name changed for this because it's embarrassing. I'm head of a department in a new-ish role. I've been asked to prepare the budget for the next year for my whole department. It includes headcount, travel, expenses, third party services etc. I have absolutely no idea how to budget for this!! I don't know the costs of half the things. I've also left it really late to look for help.
Any tips for filling my Opex Forecast?? 